Plain-language explanation.
Criminology is the scientific study of crime, criminals, and the criminal justice system. It asks why people commit crimes, how society responds to crime, and what works to reduce it. Criminologists are interested not just in individual behaviour but in how social structures, institutions, and policies shape crime and punishment.
Core concepts and standard treatment.
Core criminology covers classical theories (Beccaria — punishment must be certain, swift, proportionate; Bentham — deterrence, panopticon; rational choice theory — Clarke and Cornish — cost-benefit analysis), positivist criminology (Lombroso — criminal anthropology — atavism; Goddard — feeblemindedness; biological determinism — critiqued for pseudoscience; shift to social factors), social strain theories (Merton — anomie and strain — five adaptations — conformity, innovation, ritualism, retreatism, rebellion; Cohen — status frustration and delinquent subcultures; Cloward and Ohlin — differential opportunity theory), and social control theories (Hirschi — social bond theory — 4 elements: attachment, commitment, involvement, belief; self-control theory — Gottfredson and Hirschi — low self-control as general theory of crime).
Deeper theory, debates and edge cases.
Advanced criminology covers critical criminology (Marxist criminology — Quinney — the social reality of crime; Left Realism — Young, Lea — square of crime — victim, offender, police, public; feminist criminology — Chesney-Lind — gender gap in crime; Heidensohn — women in criminal justice; masculinities — Connell; green criminology — environmental crime — White; corporate crime — Sutherland — white-collar crime), desistance and rehabilitation (Maruna — making good — narrative identity change; Laub and Sampson — age-graded theory — social bonds across life course; What Works? — Andrews and Bonta — risk-need-responsivity model — RNR — actuarial risk assessment — OASys; desistance-informed practice — Good Lives Model — Ward), and quantitative criminology (crime drop — Zimring, Levitt, Farrell — routine activity theory — Cohen and Felson; hot spots policing — Sherman; systematic reviews — Campbell Collaboration; predictive policing — PredPol controversy — algorithmic bias).
How it is applied in practice.
At the professor, Home Office policy adviser, and criminal justice reform leader level, practitioners contribute to British Journal of Criminology and Criminology; advise the Ministry of Justice and HMPPS on sentencing, probation, and prisons policy (desistance-informed community sentences; through-the-gate support; reducing reoffending — Breaking the Cycle; Violence Reduction Units — VRU — Scotland model); lead evaluation of crime prevention programmes (situational crime prevention — problem-oriented policing — Goldstein; evidence-based policing — College of Policing; EMMIE framework); advise the Independent Office for Police Conduct (IOPC) on complaints and use of force; and contribute to restorative justice programmes (Thames Valley Restorative Justice — Sherman; circle sentencing; Truth and Reconciliation Commission principles — post-conflict criminology).