Humans are a species that classifies. We arrange the flow of the things and events that we see and experience, place them into categories, and erect boundaries around those categories. Among the boundaries that we erect are those that we put around groups of "other" human beings. The evil side of human classification of other human beings is that we sometimes create false categories of other people, as is often the case in racial, ethnic, and religious stereotypes. This unmindful creation of empty categories of human characteristics is what happened during two periods crucial to the construction of race in America. This is racism. The United States is in a period of deep cultural flux and conflict, much of it seen through the lens of race. This book proposes that the everyday actions of ordinary people, in the context of extreme political and cultural polarization, distort the criminal justice system and betray the lofty ideals expressed in American founding documents and centuries of Anglo-American articulations of basic human rights. These everyday actions range across a spectrum from the armed intervention of private citizens in the forms of individual action, neighborhood watches, and citizen's arrests, to the expectations imposed on law enforcement, in particular, and the criminal justice system in general.

Tragedy in Aurora is about the 2012 murder of budding sports journalist Jessica (Jessi) Redfield Ghawi in a public mass shooting, and the widening circle of pain it inflicted on her family, friends, police, medical first responders, and others. The book is at the same time a deep examination of the causes and potential cures of the quintessential 21st century American sickness-public mass shootings. At the heart of that examination is an unpacking of America's deep polarization and political gridlock. It addresses head on the question of why? Why is American gun violence so different from other countries? Why does nothing seem to change? The "Parkland kids" inspired hope of change. But the ultimate questions stubbornly remain-what should, what can, and what will Americans do to reduce gun violence? Tragedy in Aurora argues that the answer lies in a conscious cultural redefinition of American civic order. Over recent decades, America has defined a cultural "new normal" about guns and gun violence. Americans express formalistic dismay after every public mass shooting. But many accept gun violence as an inevitable, even necessary, and to some laudable part of what it means to be "American." Although Americans claim to be shocked with each new outrage, so far they have failed to coalesce around an effective way to reduce gun death and injury. The debate is bogged down in polarized and profoundly ideological political and cultural argument. Meanwhile, America continues to lead the globe in its pandemic levels of gun deaths and injuries. Combined with the cynical "learned helplessness" of its politicians, the result is gridlock and a growing roll of victims of carnage. Is there a path out of this cultural and political gridlock? Tragedy in Aurora argues that if America is to reduce gun violence it must expand the debate and confront the fundamental question of "who are we?" Tom Diaz gives a new understanding of American culture and the potential for change offered by the growing number and ongoing organization of victims and survivors of gun violence. Without conscious cultural change, the book argues, there is little prospect of effective laws or public policy to reduce gun violence in general and public mass shootings in particular.

The gun industry is the last unregulated manufacturer of a consumer product in America. This book argues that the rise in gun violence is due to increased lethality. It shows how, since the 1970s, the gun industry has fought declining profits by increasing the killing power of its weapons.