Constitutional governments are political systems where the authority of the government is defined and limited by a constitution, establishing a framework for governance and protecting individual rights. This form of government contrasts with absolute rule, as it often involves a separation of powers, checks and balances, and the rule of law, ensuring that the rights of citizens are safeguarded against arbitrary authority. Constitutional governments emerged as a response to the age of absolutism, promoting the idea that power should derive from the consent of the governed.