A constitution performs the role of stating the functions and limitations of leaders.
A constitution is a set of laws and principles that serve as the supreme law of a country. It outlines the structure of the government, defines the powers of the different branches of government, and sets limits on what the government can and cannot do. By doing so, a constitution helps to ensure that the government operates within the bounds of the law, and protects the rights and freedoms of citizens. This means that the leaders of a country must abide by the rules and limits set forth in the constitution, and that the government is accountable to the people.