A political constitution establishes checks on executive power through the legislature. Forms of government include authoritarianism, where non-elected rulers permit some individual freedom, anarchy which is a state of lawlessness without a supreme power, and anarchism which favors a stateless society without unnecessary government. Democracy is a form of government where people rule directly or through elected representatives based on principles of equality and freedom. A state is a set of institutions that govern people within a territory and have internal and external sovereignty.