Second Treatise of Government explained simply

Second Treatise of Government argues that legitimate political power comes from the consent of free and equal people, not divine right or inherited monarchy. Locke explains natural rights, property, civil society, legislative limits, executive power, prerogative, conquest, usurpation, tyranny, and the right to resist a government that destroys the purpose for which it was created. His central claim is that government is a trust for protecting life, liberty, and property.

Why it matters: It became a foundational text for liberal constitutionalism, natural rights theory, and arguments against absolute monarchy.

Modern relevance: It remains central to debates about constitutional limits, consent, property, executive power, civil rights, and legitimate resistance.