HomeLaw & LegalCriminal Law (continued)What is Necessity Defense?
Law & Legal·2 min·Updated Mar 15, 2026

What is Necessity Defense?

Necessity Defense

Quick Answer

A necessity defense is a legal argument used in criminal cases where a person claims they committed a crime to prevent a greater harm. It asserts that the illegal act was justified because it was necessary to avoid a more serious consequence. This defense is based on the idea that sometimes breaking the law is the lesser evil.

Overview

The necessity defense is a legal principle that allows individuals to argue that they had to commit a crime in order to prevent a more significant harm from occurring. This defense is often used in situations where a person breaks the law to save themselves or others from danger. For example, if someone steals food to feed a starving child, they might claim necessity to justify their actions in court. To successfully use the necessity defense, the defendant must show that the harm they were trying to avoid was imminent and that there were no legal alternatives available to prevent it. This means that the situation must have been urgent enough that acting unlawfully was the only option to avert a greater disaster. Courts will consider the circumstances surrounding the act and whether the response was proportional to the threat faced. The necessity defense is important in criminal law because it recognizes that not all illegal actions are morally wrong in every context. It provides a way for the justice system to consider the motivations behind a person's actions and to evaluate whether the law should be applied rigidly or with compassion. This defense can highlight the complexities of human behavior and the sometimes difficult choices individuals must make in dire situations.


Frequently Asked Questions

The necessity defense can be used in various situations where a person believes that committing a crime is the only way to prevent a greater harm. Common examples include cases involving emergencies, such as breaking into a building to escape a fire or taking someone else's property to save a life.
No, the necessity defense is not always successful and depends on the specific circumstances of each case. Courts will carefully evaluate the facts to determine if the defendant's actions were truly necessary and if there were no reasonable alternatives available.
The necessity defense is one of several legal defenses available to defendants in criminal cases. It is often compared to the duress defense, which involves being forced to commit a crime under threat, but necessity focuses on preventing harm rather than responding to coercion.