Which document primarily outlines the concept of Constitutionalism?

The Constitution of the United States is the fundamental document that primarily outlines the concept of Constitutionalism. Constitutionalism refers to the principle that the authority of government derives from and is limited by a body of fundamental law. The Constitution establishes the framework for the federal government, delineating its powers and responsibilities while also instituting checks and balances among the various branches. It embodies the rule of law, ensuring that no one is above the law, and that governmental officials must operate within the confines of the Constitution.

The Constitution also includes provisions for amendments, allowing for the document to evolve over time in response to changing societal needs—a reflection of the flexibility inherent in constitutional governance. This framework is crucial for protecting individual rights and maintaining democratic principles, which are essential tenets of American governance. Thus, it is through the Constitution that the concept of Constitutionalism is robustly articulated and safeguarded.