The primary function of a constitution in a democracy is to establish the foundational rules and principles governing a political system. It outlines the structure of government, the powers of each branch, and the rights of citizens, ensuring that governance occurs within a framework of legality and fairness. A constitution serves to protect individual freedoms, maintain the rule of law, and provide a mechanism for amending laws as society evolves. This essential document fosters stability, accountability, and a commitment to democratic values.