By Brandon C. Welsh , Steven N. Zane ,Daniel P. Mears 

The present state of calls for and efforts to implement evidence-based policy provide a powerful foundation for propelling a movement toward bringing about rational, cost-efficient, and humane policies for reducing aggression, crime, and violence. The main aim of this article is to report on new developments in evidence-based policy (EBP)—what we view as giving rise to a new era in crime and violence prevention and social justice. The article describes major advances, both in research and policy, and discusses pressing challenges that confront EBP in crime/violence and justice, drawing on key findings from a new, comprehensive book project. The overall conclusion of the findings is heartening and yet sobering. Research and policy have made substantial progress, but there is much more to be done. The specific details of this work are organized around three questions that are foundational to evidence-based crime/violence and justice policy today: (a) How is research contributing to and guiding EBP? (b) What are productive and new ways to think about EBP? and (c) What are strategies for pro moting greater use of EBP?    

Aggression and Violent Behavior Volume 77, July–August 2024, 101940

By Paul M. Reeping & David Hemenway 

Background: Previous studies have linked weather to crime and aggression but have not considered the causal structure of the variables included in the model(s).

Methods: This cross-sectional study used data from 2012 to 2016 to measure the association between weather and the number of shootings in Chicago. The number of shootings per day was obtained via the Chicago Tribune (2012–2016). Daily high temperature, humidity, wind speed, difference in temperature from historical average, precipitation type, and amount, were extracted via The Weather Underground. Weekends, holidays, and other non-school days were also included as possible effect measure modifiers. Causally adjusted negative binomial regressions were used to evaluate the associations between the exposures of interest and the daily number of shootings.

Results: A 10-degree (°C) higher temperature was significantly associated with 34% more shootings on weekdays and 42% more shootings on weekends or holidays. A 10-degree higher temperature than average was also associated with a 33.8% higher rate of shootings.

Conclusion: In recent years, shootings in Chicago were more likely to happen on warm days and especially during the weekends or holidays. This finding is in line with studies that have linked crime to higher temperatures and also suggests that shootings may be related to when individuals are outside and more likely to encounter violence. Interventions that keep people inside, such as air-conditioning and summer programs for students, might be effective in reducing the number of shootings in Chicago. We believe using a causal structure is useful for understanding the link between weather and shootings.

Injury Epidemiology volume 7, Article number: 31 (2020) 

By Eli Sagan

From the Introduction: “…This tragic tale, however, is only half the story. Throughout history, human beings demonstrate an equally extraordinary capacity to renounce aggression and to widen the definition of human to include more and more of the people in the world. Christianity puts an end to the barbarism of the Roman arena and proclaims that even a slave has a soul, Islam puts an end to female infanticide, slavery practically disappears from the world, the barbarisms of early industrial capitalism are renounced, democracy asserts the individual worth of all in society, the noncannibal head-hunter renounces the great aggressive pleasure of eating human flesh…”

NY. Harper and Row. 1974. 168p.