43. The Decline and Fall of Violence

Episode Summary

Executive Summary: The segment argues that crime in the U.S. has fallen sharply and that public perceptions lag behind reality. Stephen Levitt cites multiple explanations for the decline—more incarceration, more policing, crack-market changes, and legalized abortion—and contrasts data with people’s fear-based intuitions about crime and risk, which are often driven by vivid events rather than statistical reality.

Main Topics: Crime has fallen sharply in the U.S. (Priority: 5/5): Levitt stresses that crime is not rising; instead, it has dropped substantially over recent decades despite public anxiety and media narratives. Why crime declines: four major factors (Priority: 5/5): Levitt attributes the drop to increased incarceration, expanded policing, changes in crack cocaine markets, and a controversial abortion-legalization hypothesis. Historical decline in violence (Priority: 4/5): The discussion broadens beyond the U.S. to Steven Pinker’s argument that violence has declined dramatically over human history, making modern societies comparatively safer. Economy and crime are not simply linked (Priority: 4/5): The speakers challenge the common assumption that bad economic times necessarily cause more crime, citing examples where crime fell during recessions and rose during booms. Public perception and risk miscalibration (Priority: 4/5): Levitt argues people systematically misjudge risk, overreacting to dramatic, memorable threats like terrorism or airplane crashes while underestimating slower, less visible dangers. Media framing and recurring mistaken predictions (Priority: 3/5): Dubner notes that journalists often predict crime will rise in recessions, only to report the opposite when crime falls, reinforcing a misleading narrative loop.

Key Arguments: Crime in the U.S. has fallen by about half over the last two decades, contrary to popular belief. The biggest contributors to lower crime are more prisoners, more police, the collapse of crack markets, and possibly fewer births among future high-risk offenders after abortion legalization. Crime can decline even in weak economies; the relationship between macroeconomic conditions and crime is not straightforward. People overestimate dramatic threats and underestimate mundane ones, which distorts their sense of whether crime is worsening. Historical violence rates were far higher than modern ones, suggesting contemporary society is relatively peaceful by long-run standards.

Data Points: Violence in tribal societies: About 15% - Estimated share of people in some tribal hunter-gatherer societies who died through violence, according to Steven Pinker as cited in the segment. Violent deaths in the 20th century: About 3% - Highest estimated share of deaths from war, genocide, and man-made famine in the 20th century, per Pinker’s argument. U.S. prison population: 3 million - Current number of people behind bars in the United States, cited as a major contributor to reduced crime. U.S. prison population earlier level: About 500,000 - Approximate number of incarcerated people in the earlier period before the modern expansion in imprisonment. U.S. crime trend over last two decades: Fell by half - Levitt’s summary of the long-term decline in crime in the United States. Henry VIII-era executions: 10 people a week - Historical example used to illustrate how routine public violence once was.

Pivotal Quotes: "The world is a more peaceful place today than literally at any time in history by a long, long shot." — Stephen Levitt: Levitt summarizes the broader historical decline in violence. "Over the last two decades, crime in the U.S. has fallen in half." — Stephen Levitt: Levitt explains the modern U.S. crime trend. "I think people in general are terrible at assessing risks." — Stephen Levitt: Levitt explains why public perception diverges from data on crime and danger.

Implications: Listeners should be skeptical of intuitive and media-driven fears about crime. Policy debates should rely more on data than headlines, especially when judging policing, incarceration, and social risk.