The Constitution of Nigeria is the supreme legal document that outlines the framework of the government and the rights of citizens. Adopted in 1999, it established Nigeria as a federal republic, detailing the separation of powers among the executive, legislative, and judicial branches. This constitution also guarantees fundamental human rights, including freedom of speech and religion. It serves as a guide for governance and law enforcement, aiming to promote democracy and protect the rights of all Nigerians, ensuring that the rule of law prevails in the country.