Mass incarceration

Mass incarceration is the large-scale use of imprisonment as a response to crime, especially in the United States. It is marked by historically high imprisonment rates and their unequal distribution across social groups.

War on Drugs: A set of U.S. policies and enforcement campaigns that intensified penalties and policing for drug offenses. Drug enforcement and mandatory penalties drove a large rise in U.S. prison admissions.
Prison-industrial complex: A framework describing political and economic interests associated with the expansion of prisons and punishment. It examines institutions and incentives that can sustain expansive incarceration.
United States prison population: The number of people held in U.S. prisons, a measure distinct from the broader jail population. Its long-term growth provides a central measure of mass incarceration.
Restorative justice: An approach to justice that emphasizes repairing harm through participation by affected people and communities. It centers accountability and repair rather than prison as the default response.
Sentencing disparity: Differences in punishment for similar offenses that cannot be explained by legally relevant factors. Researchers examine whether discretion and policy produce unequal sentence lengths.
Mandatory sentencing: Laws requiring fixed or minimum penalties for specified offenses, limiting judges’ sentencing discretion. Mandatory penalties lengthened sentences and reduced opportunities for individualized sentencing.
Collateral consequences of criminal conviction: Legal and practical penalties that continue after a criminal conviction, beyond the sentence itself. Incarceration and conviction can restrict employment, housing, voting, and public benefits.
Prison reform: Efforts to change prison conditions, sentencing, or the role of imprisonment in criminal justice. Reform movements have responded to prison expansion and its human costs.
Community corrections: Supervision and treatment in the community as alternatives or complements to incarceration. It offers ways to respond to offenses without placing every person in prison.
Recidivism: A return to criminal behavior or justice-system involvement after a prior sanction or intervention. Claims about prison’s effects often hinge on whether incarceration reduces later offending.

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