The U.S. government's system of checks and balances divides power among three branches: legislative, executive, and judicial. This structure, established by the Constitution, aims to prevent any single branch from becoming too powerful and safeguard individual liberties. Each branch has distinct roles and can check the others' powers. The legislative branch makes laws, the executive enforces them, and the judiciary interprets them. This system, rooted in historical influences and constitutional provisions, continues to evolve and face modern challenges.