This document provides an introduction to principles of government and political systems. It discusses the key features of a state, including population, territory, sovereignty and government. It then covers theories on the origin of the state, such as evolutionary, force, divine right and social contract theories. The document outlines the main purposes of government as maintaining social order, providing public services and national security. It also defines different types of government systems and the role of constitutions in establishing the rules and structure of a government. Finally, it discusses concepts like politics, different views of the world, and international organizations.