The past 25 years have seen a major paradigm shift in the field of violence prevention, from the assumption that violence is inevitable to the recognition that violence is preventable. Part of this shift has occurred in thinking about why violence occurs, and where intervention points might lie. In exploring the occurrence of violence, researchers have recognized the tendency for violent acts to cluster, to spread from place to place, and to mutate from one type to another. Furthermore, violent acts are often preceded or followed by other violent acts. In the field of public health, such a process has also been seen in the infectious disease model, in which an agent or vector initiates a specific biological pathway leading to symptoms of disease and infectivity. The agent transmits from individual to individual, and levels of the disease in the population above the baseline constitute an epidemic. Although violence does not have a readily observable biological agent as an initiator, it can follow similar epidemiological pathways. On April 30-May 1, 2012, the Institute of Medicine (IOM) Forum on Global Violence Prevention convened a workshop to explore the contagious nature of violence. Part of the Forum's mandate is to engage in multisectoral, multidirectional dialogue that explores crosscutting, evidence-based approaches to violence prevention, and the Forum has convened four workshops to this point exploring various elements of violence prevention. The workshops are designed to examine such approaches from multiple perspectives and at multiple levels of society. In particular, the workshop on the contagion of violence focused on exploring the epidemiology of the contagion, describing possible processes and mechanisms by which violence is transmitted, examining how contextual factors mitigate or exacerbate the issue. Contagion of Violence: Workshop Summary covers the major topics that arose during the 2-day workshop. It is organized by important elements of the infectious disease model so as to present the contagion of violence in a larger context and in a more compelling and comprehensive way.

The first joint survey of prisoners held in state and federal prisons. Interviews were conducted among inmates housed in 53 federal and 273 state prisons. Samples consist of about 14,000 state prisoners and about 6,600 federal prisoners. They were queried about their social and criminal histories. Represents the single largest collection of information on prisoners ever undertaken in the U.S. Covers: current offense, sentence length, criminal history, drug and alcohol use, weapons, personal and family characteristics, HIV, and activities since admission.

In this controversial and compassionate book, the distinguished psychiatrist James Gilligan proposes a radically new way of thinking about violence and how to prevent it. Violence is most often addressed in moral and legal terms: "How evil is this action, and how much punishment does it deserve?" Unfortunately, this way of thinking, the basis for our legal and political institutions, does nothing to shed light on the causes of violence. Violent criminals have been Gilligan's teachers, and he has been their student. Prisons are microcosms of the societies in which they exist, and by examining them in detail, we can learn about society as a whole. Gilligan suggests treating violence as a public health problem. He advocates initiating radical social and economic change to attack the root causes of violence, focusing on those at increased risk of becoming violent, and dealing with those who are already violent as if they were in quarantine rather than in constraint for their punishment and for society's revenge. The twentieth century was steeped in violence. If we attempt to understand the violence of individuals, we may come to prevent the collective violence that threatens our future far more than all the individual crimes put together.