Criminal law

Key people

• Carlo BiottiItalian judge
• Concepción Arenal PonteSpanish lawyer, writer and feminist activist, editor (1820-1893)
• Karim Ahmad KhanBritish lawyer, chief prosecutor of the International Criminal Court
• Janusz WojciechowskiPolish politician

Read

• Criminal lawGreat Britain. Law Commission. · 1968Book
• Unlocking criminal lawJacqueline Martin · 2007Book
• International criminal lawIlias Bantekas · 2001Book
• Principles of criminal lawAndrew Ashworth · 1991Book

Listen

• Understanding Basic Criminal LawHugo Vera MolinetPodcast
• Defense DiariesDefense DiariesPodcast
• Law&Crime SidebarLaw&CrimePodcast
• Criminal Law UnfilteredcriminallawunfilteredPodcast

Voices to follow

• Matthew Hall@Matthewh_books · XBritish screenwriter, novelist, & barrister
• Alon Harel@msalon · XIsraeli academic
• Zion Amir@Zionamir1 · XIsraeli lawyer
• Carole McCartney@ctmccartney · XCriminologist

By the numbers

• 27.2Women in parliament (%) — global, 2025 (World Bank)

Debates

• Should mandatory minimum sentences be abolished?One view: Mandatory minimums ensure consistent punishment for serious crimes and deter offenders. · Another: They remove judicial discretion, can lead to unjust outcomes, and disproportionately affect certain groups.Open question
• Is the primary goal of criminal punishment retribution or rehabilitation?One view: Punishment should primarily ensure offenders pay for their actions and society receives justice. · Another: Punishment should focus on reforming offenders to prevent future crimes and reintegrate them into society.Open question
• Should all criminal convictions require proof of criminal intent (mens rea)?One view: Requiring intent protects individuals from being punished for accidental harm or actions without malicious purpose. · Another: Some crimes, like negligence or public safety offenses, should be punishable even without specific intent to cause harm.Open question

Glossary

• Mens ReaThe mental state or intent required for a crime to have been committed.
• Actus ReusThe physical act or omission that constitutes the criminal offense.
• Due ProcessThe legal requirement that the state must respect all legal rights owed to a person.
• FelonyA serious crime, typically punishable by imprisonment for more than one year.
• MisdemeanorA less serious crime, typically punishable by a fine or imprisonment for less than one year.
• Plea BargainAn agreement where a defendant pleads guilty to a lesser charge or in exchange for a lighter sentence.

Careers

Roles this can lead toward

Threads 10

Where this connects to other fields — and why it's worth knowing.

• How Habits Form and Break Psychology

  Behavior science says what actually stops people is getting caught quickly and reliably, not how harsh the punishment is. A brutal sentence handed down years later barely changes anyone's choices. It's like zapping a rat an hour after it presses the lever: the delay is so long the rat never links the two, so it doesn't learn.

• The Engineering Design Process Technology

  An engineer builds a bridge to hold three times the weight it'll ever carry, wasting steel on purpose so it never collapses. A court demands proof 'beyond reasonable doubt,' letting some guilty people go free so it rarely jails an innocent one. Both deliberately accept the small, cheap mistake to dodge the giant, catastrophic one.

• Diagnosing Mental Disorder Psychology

  Whether a killer ends up in a prison cell or a hospital ward can come down to a single diagnosis, sane or not sane. But the line between those categories is blurry, and psychiatrists keep rewriting where it sits. So the insanity defense forces hard courtroom decisions to rest on labels that are still being argued over.

• Consciousness and the Mind Philosophy

  Courts have actually let people walk free after killing someone while sleepwalking. Why? Because guilt secretly depends on a question nobody has fully solved: was there a conscious 'you' at home, in control, when it happened? A deep mystery about the mind sits quietly at the center of who we punish.

• Free Will and Responsibility Philosophy

  Our whole system of blame and prison assumes you freely chose to do the crime. But if your choices are just brain chemistry firing, causes you didn't pick, then does 'you decided' even hold up? That's why free will is silently on trial in every courtroom, underneath the actual case.

• Consciousness & the Self Psychology

  In rare split-brain patients, the two halves of the brain can want different things, like two decision-makers sharing one skull. But our whole justice system assumes there's one single 'you' to hold responsible. So the brain science of the self quietly pokes a hole in the basic idea of blame.

• The Trolley Problem Philosophy

  The trolley problem, kill one to save five, is secretly running inside real courtrooms. It's why the law treats aiming to kill someone as murder, but accidentally causing a death while doing something legal might not be. The whole question is whether you meant it or just saw it coming.

• Autonomous Weapons Technology

  To punish someone for a crime, the law usually needs a guilty mind, a person who chose to do wrong. A machine that kills on its own has no mind and no intent. So it can leave a dead body with nobody the courts can actually convict.

• Addiction and the Brain Psychology

  Punishment assumes a person freely chose to break the law. But if addiction is a brain illness that hijacks the ability to choose, that assumption cracks. How do you punish a 'free choice' when the brain science says the choice wasn't fully free?

• Utilitarianism vs Kantian Ethics Philosophy

  Why do we jail people: because they deserve it, or to stop future crime? That's the exact fight between two big theories of right and wrong. One says follow the rule (punish because it's earned), the other says chase the best outcome (punish to protect people). Every prison sentence is secretly a philosophy argument.