William Healy’s The Individual Delinquent, first published in 1915, is a landmark in the development of modern criminology, juvenile justice, and the scientific study of offenders. Based on five years of intensive research with more than a thousand young repeat offenders at Chicago’s Juvenile Psychopathic Institute, Healy challenged the prevailing search for a single explanation of criminal behavior. Instead, he argued that delinquency could be understood only by examining the individual offender and the complex interaction of psychological, physical, developmental, family, and environmental factors.

Healy’s central question remains strikingly contemporary: not simply what crime was committed, but why did this particular person commit it? His approach combined family and developmental histories, medical examinations, psychological testing, investigation of home and social environments, and extensive personal interviews. He emphasized diagnosis, prognosis, treatment, and follow-up rather than reliance upon punishment or abstract theories of criminality.

This Read-Me.Org Modernized-Classic makes Healy’s massive original work accessible to contemporary readers. The original volume of more than 800 pages has been abridged to approximately one-quarter of its length while retaining Healy’s organization and central arguments. The text has been rendered in modern English, representative case histories have been condensed, and editorial notes identify obsolete terminology and historically limited assumptions. Review and discussion questions make the volume particularly suitable for students and classroom use.

Both a historical document and a surprisingly modern argument for individualized justice, The Individual Delinquent illuminates the emergence of psychological and clinical approaches to crime and demonstrates why understanding the person behind the offense became a fundamental concern of twentieth-century criminology. Download the original book here.

Read-Me.Org Inc. New York-Philadelphia-Australia. 2026. p.114.

by Graeme Newman (Author), Sheldon Glueck (Author), Eleanor Glueck

Why do some children in a family, or on the same street, turn to delinquency while their brothers, sisters and neighbors do not?

In Family Environment and Delinquency (1962), Sheldon and Eleanor Glueck, the most celebrated husband-and-wife team in the history of criminology, set out to answer one of the oldest and most stubborn questions in the study of crime. Drawing on their landmark comparison of 500 persistent delinquents and 500 matched non-delinquents from the poor neighborhoods of Boston, they traced how the home, what they called the "under-the-roof culture," shapes children's traits, and how those traits and family conditions combine to push some boys over the edge.

Their answer was startling for its time and remains compelling today: the family environment works selectively. A drunken father, a chaotic household, harsh or erratic discipline, chronic poverty: none of these alone reliably produces a delinquent. What matters is the meeting of a particular pressure with a particular child. The Gluecks called it "differential contamination," which depends "not merely on exposure but also on susceptibility." It is an idea that anticipates today's research on gene-environment interaction and differential susceptibility.

The original book is dense with thousands of statistical tables. This Mini-Classic sets out its argument clearly and concisely, chapter by chapter. It includes an introduction to the book and its central ideas; a profile of Sheldon and Eleanor Glueck and their four-decade research partnership; the historical context of Unraveling Juvenile Delinquency, Physique and Delinquency, and the Gluecks' battle with differential association theory; a clear summary of every chapter, from the origins of traits to the practical management of delinquency; a chapter on modern relevance, from Sampson and Laub's rediscovery of the Glueck files to today's family-based prevention programs, with a frank account of what has not survived; and twenty review questions for students and discussion groups.

Ideal for students of criminology, sociology, psychology and social work, for practitioners working with young people and families, and for anyone interested in the enduring question of Nature and Nurture.

Read-Me.Org Mini-Classics make the landmark works of social science accessible to modern readers in brief, readable editions. Download the original book here.

Read-Me.Org Inc. New York-Philadelphia-Australia. 2026. p.67.

by Graeme Newman (Author), Sheldon Glueck (Author), Eleanor Glueck

What makes a boy a persistent delinquent? A reader's guide to one of criminology's great matched-comparison studies.

In 1939, Sheldon and Eleanor Glueck of Harvard stopped asking what happens to offenders after they are caught and asked a harder question: why do some boys from the same poor neighborhoods become persistent delinquents while others do not?

Their answer, Unraveling Juvenile Delinquency (1950), compared 500 delinquent boys with 500 non-delinquents, matched pair by pair on age, intelligence, ethnic origin and neighborhood. They examined family life, schooling, health, body build, intelligence, personality and temperament. Then they built "prediction tables" meant to spot at-risk children when they start school.

The book is long, technical and dated in its language. This Reader's Guide makes it accessible without replacing it. It explains how the study was designed, what it found, and how far its evidence can be trusted, and it connects the Gluecks to the research that followed.

INSIDE THIS GUIDE

• A reading plan and a chapter-by-chapter map of the original

• How the two groups were built, and what the design can and cannot show

• The findings on family, school, the street, health, physique, intelligence and temperament, explained in plain language

• The prediction tables, with a worked example that shows why "79 chances in a hundred" can mean something quite different in real life

• Five common misreadings of the book

• What has changed since 1950, including later reanalyses of the Gluecks' data, and what has not

• A primer on statistics, a glossary, an annotated reading list, an FAQ, 26 discussion questions and classroom activities

WHO IT'S FOR: Students of criminology, sociology, psychology, social work and law; teachers and reading groups; and general readers who want to understand a landmark study and the debates it started, from risk assessment to the role of the family.

Part of the Read-Me.Org Reader's Guide series, bringing back landmark out-of-print works in criminology and social science..

NOTE: This is an independent guide, not an abridgment or edition of the Gluecks' book. It does not reproduce the original's text or tables and is not endorsed by the authors' heirs or the original publisher. It is meant to be read alongside the original. Written by Graeme R. Newman with the assistance of Claude, an AI model made by Anthropic. The AI-generated content is disclosed in accordance with Read-Me.Org policy. Read the Original Book online.

Read-Me.Org Inc. New York-Philadelphia-Australia. 2026. p.67.

by Graeme Newman (Author), Sheldon Glueck (Author), Eleanor Glueck

Does the shape of a body shape a life?

In 1956, Harvard criminologists Sheldon and Eleanor Glueck published one of the most provocative findings in the history of criminology: among the 500 persistent juvenile delinquents at the heart of their landmark study, six in ten were built like athletes — solid, muscular, "mesomorphic" — compared to fewer than one in three of the matched non-delinquent boys from the very same streets. Boys of slight, fragile build were strikingly rare among the delinquents. Matched for age, intelligence, ethnicity, and neighborhood, the two groups differed sharply in one thing neither had chosen: the body they were born with.

Physique and Delinquency is the Gluecks' full investigation of what that difference meant — and what it didn't. Carefully, methodically, and explicitly rejecting the old "born criminal" theories of the nineteenth century, the Gluecks set out to show that physical constitution is not destiny. Instead, they found something more nuanced and more interesting: the very same trait, and the very same troubled home, can push a sturdy, energetic boy toward trouble while leaving a more sensitive, delicately built boy untouched — and can devastate that same sensitive boy when the pressures at home turn severe.

This Read-Me.Org Mini-Classic distills the Gluecks' densely tabulated 1956 original into a compact, readable narrative — every chapter, every major finding, and the six theoretical hypotheses that close the book — while leaving the statistical tables and technical appendixes to specialists and to the full edition. It's an ideal introduction for students of criminology, psychology, and the history of science, and for anyone curious about a study that remains as influential as it is uncomfortable, nearly seventy years after it first raised the question.

Includes a new introductory essay situating the book in its historical context, and a set of review and discussion questions suited to classroom or book-club use.

Part of the Read-Me.Org Mini-Classics series — short, careful introductions to landmark and forgotten works of criminology, sociology, and social history.

This edition was prepared with AI assistance used to condense and adapt the source text under human editorial review; abridgment choices and framing are the editor's own. Published under Creative Commons licensing. Read online the original book.

Read-Me.Org Inc. New York-Philadelphia-Australia. 2026. p.80.

By Janne Kivivuori

This book presents a history of the self-report crime survey as a method of criminological inquiry, describing how it was born within a distinct moral framework by pioneers out to show that crime was very prevalent and, therefore, normal. It recounts how, during the 1930s and 1940s, a handful of U.S. criminologists discovered the method of the self-report delinquency survey — a method used to ask people directly about their crimes. Previously, criminologists had to rely on official statistics produced by the police and other control authorities; their studies were therefore constrained by the ‘official control barrier’, which perpetuated the notion that crime was linked to the lowest social strata and/or to psychological abnormality. By confronting the domination of psychiatrists and psychologists in the study of crime, criminologists began to challenge the punitive attitudes of society; thus, exposing the so-called white-collar offenders and alerting people to see crime as something that could also be found among the middle and upper classes. Expounding both the history of that discovery and its implications for criminological work, past and present, this book offers a perspective on how criminology has developed, and how it continues to advance amid the twin pressures of facts and policy goals.

Oxford, UK: New York: Oxford University Press, 2011.

By Charles M. Katz , Hyunjung Cheon , Kayla Freemon , Lidia E. Nuno˜

In this study, the authors examine the prevalence of self-reported delinquency, drug use, and gang membership among school-attending youth in nine English-speaking Caribbean nations including Antigua and Barbuda, Barbados, Dominica, Grenada, Guyana, St. Kitts and Nevis, St. Lucia, St. Vincent and the Grenadines, and Trinidad and Tobago. We also examine the frequency of these problem behaviors by gender and ethnicity. In doing so, we seek to gain an understanding of the extent and variation of delinquency and associated problems across the region and among subpopulations. The sample comprises more than 18,000 school-aged youth attending 306 schools. Our findings suggest that while offending varies significantly within and across the English-speaking Caribbean, youth engage in a disproportionate amount of violence when compared to other offense types, and though the current study is not cross-regional, youth appear to engage in substantially higher rates of violence than youth in other regions. Self-reported offending was higher among males than females for every offense type, though females in some nations reported more delinquency than males in other nations. In some of the study nations, there were no significant relationships between ethnicity and problem behaviors; however, in other nations, Afro-Caribbean, mixed, and youth from “other” ethnic backgrounds were significantly more likely to report problem behaviors than East Indian youth. Implications for future research are discussed.

Children and Youth Services Review. Volume 144, January 2023, 106758

By Peers Kayla Freemon, Veronica M. Herrera , Hyunjung Cheon , and Charles M. Katz

Growing up in a household without two parents present is an established risk factor for youth delinquency. However, much of the research on family structure and delinquency derives from U.S. samples, limiting applicability to the developing world. The present study explores the role of traditional and non-traditional family structures on self-reported delinquency in eight English Speaking Caribbean nations. We further examine the moderating role of family processes (parental attachment and parental supervision) and commitment to negative peers on this relationship. We find that youth from intact nuclear families, with a mother and father present, engage in less delinquency than youth from intact blended, single-parent, or no-parent households. Further, family structure moderated the relationship between delinquency, parental attachment, and commitment to negative peers. Theoretical and research implications are discussed.

Youth Violence and Juvenile Justice 2023, Vol. 21(2) 149–171

By Lisa Pilnik, Amber Farn, and Michael Umpierre

Through YAP’s Safely Home Initiative, six jurisdictions implemented YAP in their communities, including Yavapai County, Arizona; Alameda County, California; Fulton County, Georgia; Mecklenburg County, North Carolina; Hamilton County, Ohio, and the state of Illinois. The publication details the strategies, impact, and outcomes resulting from the implementation of the YAP Safely Home Initiative in these six communities. Policymakers, youth justice agency leaders, and others interested in supporting community-based services and alternatives to youth incarceration are encouraged to read this new resource for the field.

Center for Juvenile Justice Reform, Georgetown University, 2023. 41p.

By W. Dyer Halpern

In 2018, New York State enacted its “Raise the Age” (RTA) legislation, which raised the age of criminal responsibility from 16 to 18 years old. Under RTA, 16- and 17-year-olds accused of misdemeanors go to family court, where they can be adjudicated as juvenile delinquents. A 16- or 17-year-old accused of committing felonies is considered an “adolescent offender” (AO). When an AO is arrested for a felony-level crime, his case is initially heard in the “youth part” of the criminal/supreme/superior court system (what we’ll call “adult court” going forward). But most of these cases are quickly “removed”—that is, transferred—to family court or even directly to family court probation. Under RTA, in order for a prosecutor to keep an AO in adult court, he must prove by a preponderance of the evidence that: 1. the defendant caused significant physical injury to a person other than a participant in the offense; or 2. the defendant displayed a firearm, shotgun, rifle, or deadly weapon, as defined in the penal law in furtherance of such offense; or 3. the defendant unlawfully engaged in sexual intercourse, oral sexual conduct, anal sexual conduct, or sexual contact.1 But these factors are harder to satisfy than they might seem…..

New York: The Manhattan Institute, 2023. 23p.

By Florian Kaiser

To explore why system contact often has no crime-preventative effect, the current study examined the effects of juvenile justice contact on Situational Action Theory's (SAT) causes of crime, including personal morals, deviant peer associations, and detection risk perceptions. The analysis is based on a sample of English (Peterborough Adolescent and Young Adult Development Study) and German (Crime in the modern City study) juveniles. Propensity score matching was applied to estimate whether the lenient system contacts influenced the causes of crime in the year after the contact. The treatment effect estimates are mostly insignificant and relatively small. The few significant estimates in the English sample suggest that official contact slightly increased deviant peer associations and decreased feelings of moral guilt. Overall, the findings suggest that system contact may often have no crime-preventative effect as it does not (Germany), or only slightly (England) affect SAT's causes of crime. Previous studies, primarily based on the U.S. data, often reported more substantial effects that mostly operated in a crime-amplifying direction. It is speculated whether the less substantial impact in the current study can be attributed to the overall more lenient, diversion-oriented handling of the examined English and German offenders.

International Criminal Justice ReviewVolume 33, Issue 3 Sep 2023 Pages 225-342

By Jean Marie McGloin and Kyle J. Thomas 

Peer influence occupies an intriguing place in criminology. On the one hand, there is a long line of theorizing and empirical work highlighting it as a key causal process for delinquency. On the other, there is a group of theoretical skeptics who view it as one of the most notorious examples of a spurious link. After discussing these perspectives, this review takes stock of our intellectual advancements in understanding peer influence over decades’ worth of research toward this endeavor. We conclude that although there have been important gains, essential questions and gaps remain. Toward this aim, we offer some lines of future work that we believe offer pathways to yielding the greatest added value to the discipline. 

Annu. Rev. Criminol. 2019. 2:241–64 

By Barbara J. Costello and John H. Laub

The publication of Travis Hirschi’s Causes of Delinquency in 1969 was a watershed moment in criminology. There are many reasons for the work’s lasting influence. Hirschi carefully examined the underlying assumptions of extant theories of crime in light of what was known about the individual-level correlates of offending. He then developed critical tests of hypotheses derived from social control theory and competing perspectives and empirically assessed them using original self-report delinquency data. Many of his key findings, such as the negative correlation between attachment to parents and delinquency, are now established facts that any explanation of crime must consider. Causes of Delinquency is still cited hundreds of times per year, and it continues to spark new research and theoretical development in the field. Perhaps the most lasting legacy is the volume of criticism it has attracted and fended off, leading to its enduring contribution to the study of crime and delinquency    

  Annu. Rev. Criminol. 2020. 3:21–41

By Charles Puzzanchera, Sarah Hockenberry, and Melissa Sickmund  

  Youth and the Juvenile Justice System: 2022 National Report is the fifth edition of a comprehensive report on youth victimization, offending by youth, and the juvenile justice system. With this release, the report series has adopted a new name (the series was previously known as “Juvenile Offenders and Victims”), but the focus of the report remains unchanged: the report consists of the most requested information on youth and the juvenile justice system in the United States. Developed by the National Center for Juvenile Justice (NCJJ) for the Office of Juvenile Justice and Delinquency Prevention and the National Institute of Justice, the report draws on reliable data and relevant research to provide a comprehensive and insightful view of youth victims and offending by youth, and what happens to youth when they enter the juvenile justice system in the U.S. The report offers—to Congress, state legislators, other state and local policymakers, educators, juvenile justice professionals, and concerned citizens— empirically based answers to frequently asked questions about the nature of youth victimization and offending and the justice system’s response. The juvenile justice system must react to the law-violating behaviors of youth in a manner that not only protects the community and holds youth accountable but also enhances youth’s ability to live productively and responsibly in the community. The system must also intervene in the lives of abused and neglected children who lack safe and nurturing environments. To respond to these complex issues, juvenile justice practitioners, policymakers, and the public must have access to useful and accurate information about the system and the youth it serves. At times, such information is not available or, when it does exist, it is often too scattered or inaccessible to be useful. This report bridges that gap by pulling together the most requested information on youth and the juvenile justice system in the United States. The report draws on numerous national data collections to address the specific information needs of those involved with the juvenile justice system. The report presents important and, at times, complex information using clear, nontechnical writing and easy to-understand graphics and tables. It is structured as a series of briefing papers on specific topics, short sections that can be read independently   

 Pittsburgh, PA:  National Center for Juvenile Justice, 2022. 226p.

By Vicky Kemp, Nicola Carr, Hope Kent and Stephen Farrall

  The criminal law is supposed to treat children, being those aged under 18 years, less harshly than it treats adults because of their developmental differences. Children also have particular legal rights due to their age, needs and circumstances. While the number of children arrested by the police has fallen by two-thirds over the past ten years, there were just under 53,000 people under 18 years old brought into police custody in England and Wales during the year ending March 2022. For children who come into conflict with the law, particularly those detained and questioned by the police, special protections are required to ensure that their legal rights are protected. In addition to legal safeguards under the Police and Criminal Evidence Act 1984 (PACE), children arrested and detained by the police have legal protections under the United Nations Convention on the Rights of the Child. Within the secure environment of police custody, however, children’s experiences are rarely heard, making them almost invisible during these early stages in the criminal process. This study, funded by the Nuffield Foundation, explores the impact of PACE on the detention and questioning of child suspects. For the first time in England and Wales, this included researchers engaging with child suspects about their legal rights while detained. Talking to children about their experiences in police custody provided researchers with greater insight into the processing of child suspects by the police.  

Nottingham, UK: University of Nottingham, 2023. 121p

Lorraine Mazerolle, Sarah Bennett, Emma Antrobus, Stephanie M. Cardwell, Elizabeth Eggins & Alex R. Piquero 

Truancy in adolescence is related to detrimental developmental outcomes over the life-course, including a greater risk for delinquency during adolescence and offending in adulthood. This paper presents results from the Ability School Engagement Program (ASEP): a Third Party Policing partnership between schools and police that sought to disrupt the relationship between truancy and delinquency by communicating, in a procedurally fair dialogue, the legal responsibilities of parents to ensure their children attend school. This paper examines the impact of ASEP on antisocial behavior and the modifying effects of ASEP on the relationship between willingness to go to school and antisocial behavior.

 Journal of Quantitative Criminology volume 35, pages663–689 (2019

By Josh Rovner

 Youth arrests and incarceration increased in the closing decades of the 20th century but have fallen sharply since that time. Public opinion often lags behind these realities, wrongly assuming both that crime is perpetually increasing and that youth offending is routinely violent. In fact, youth offending is predominantly low-level, and the 21st century has seen significant declines in youth arrests and incarceration. Between 2000 and 2020, the number of youth held in juvenile justice facilities fell from 109,000 to 25,000—a 77% decline.  

Washington, DC: The Sentencing Project, 2023. 9p.

By Richard Mendel

Though the number of youth confined nationwide has declined significantly over the past two decades, our country still incarcerates far too many young people.

It does so despite overwhelming evidence showing that incarceration is an ineffective strategy for steering youth away from delinquent behavior and that high rates of youth incarceration do not improve public safety. Incarceration harms young people’s physical and mental health, impedes their educational and career success, and often exposes them to abuse. And the use of confinement is plagued by severe racial and ethnic disparities.

This publication summarizes the evidence documenting the serious problems associated with the youth justice system’s continuing heavy reliance on incarceration and makes recommendations for reducing the use of confinement. It begins by describing recent incarceration trends in the youth justice system. This assessment finds that the sizable drop in juvenile facility populations since 2000 is due largely to a substantial decline in youth arrests nationwide, not to any shift toward other approaches by juvenile courts or corrections agencies once youth enter the justice system. Most youth who are incarcerated in juvenile facilities are not charged with serious violent offenses, yet the United States continues to confine youth at many times the rates of other nations. And it continues to inflict the harms of incarceration disproportionately on Black youth and other youth of color – despite well-established alternatives that produce better outcomes for youth and community safety.

Washington, DC: Sentencing Project, 2022. 34p.

By The National Governors Association

Youth involved in the juvenile justice system routinely face a variety of repercussions beyond detention. Although some of these may be directly related to the violation that occurred, there are many other secondary effects that can result from their system involvement. These secondary repercussions, or collateral consequences, can negatively impact youth and their families upon even the lowest level of engagement with the juvenile justice system. Such side effects can restrict a youth’s ability to recover and develop into a productive and self-sustaining adult citizen.

To better understand the range of collateral consequences youth may face, NGA conducted a series of learning calls and hosted a virtual roundtable titled “Strategies to Address the Needs of Juveniles Impacted by Collateral Consequences” during the fall of 2022. This roundtable convened national, state, and local subject-matter experts to explore the breadth of collateral consequences faced by justice-involved youth, the challenges and barriers policymakers face when addressing these consequences and policy options state leaders may consider to mitigate the negative effects that may result when youth interact with the juvenile justice system. This publication documents these high-level discussions and highlights key policy strategies for Governors’ offices to consider addressing this issue.  

Washington, DC: NGA, 2023. 12p.

By The National Juvenile Justice Network

Realizing true youth justice means ensuring youth live in a well-resourced ecosystem of community-based, trauma-informed and healing-centered responses to youth needs that create a pathway to opportunity, success and thriving for young people. An integral part of that ecosystem is a positive school environment that honors who young people are, pushes them to do their best, helps them when they encounter challenges, and extends grace when they miss the mark. When young people have access to positive school environments, they are better equipped to come to school with enthusiasm for learning, discover their dreams and passions, find ways to positively impact their school environment and learn from mistakes when they arise.
Unfortunately, a “surveillance” culture permeates too many of today's schools where students are penalized instead of encouraged to achieve their highest goals. Black, Brown, Indigenous, LGBTQIA+, and disabled students more often experience these types of surveillance school environments, which cause young people stress, trauma, and alienation and detract from their ability to learn and grow. Ultimately, it can lead students to become so disaffected that they drop out of school or are forced out through suspension, expulsion, or arrest.

Washington DC: NJJN, 2022. 45p.

By David P. Farrington and Brandon C. Welsh

After decades of rigorous study in the United States and across the Western world, a great deal is known about the early risk factors for offending. High impulsiveness, low attainment, criminal parents, parental conflict, and growing up in a deprived, high-crime neighborhood are among the most important factors. There is also a growing body of high quality scientific evidence on the effectiveness of early prevention programs designed to prevent children from embarking on a life of crime. Drawing on the latest evidence, Saving Children from a Life of Crime is the first book to assess the early causes of offending and what works best to prevent it. Preschool intellectual enrichment, child skills training, parent management training, and home visiting programs are among the most effective early prevention programs. Criminologists David Farrington and Brandon Welsh also outline a policy strategy--early prevention--that uses this current research knowledge and brings into sharper focus what America's national crime fighting priority ought to be. At a time when unacceptable crime levels in America, rising criminal justice costs, and a punitive crime policy have spurred a growing interest in the early prevention of delinquency, Farrington and Welsh here lay the groundwork for change with a comprehensive national prevention strategy to save children from a life of crime.

New York: Oxford, UK: Oxford University Press, 2006. 248p.