This document discusses the key concepts of constitutional government. It defines a constitution as the fundamental law that establishes the principles of government. Constitutional government is defined as a system of government where power is divided and limited by a constitution to protect civil liberties and individual rights. It also establishes that power in a constitutional government is derived from the people and limited by a higher law to prevent autocratic rule. The document notes that characteristics of constitutional government include separation of powers, checks and balances, civil liberties, and that power is derived from popular sovereignty rather than an individual ruler.