According to Easton, “Politics is the authoritative allocation of values. ”Concept of political system is much wider than the concepts of state, government and constitution. Political system includes formal organisation of state and government as well as the informal elements that affect them. Modern thinkers like David Easton and Almond consider Political Science as study of political system.
State and governance give emphasis on the study of formal and legal aspect of political life, whereas, under political system, it is attempted to derive the knowledge about political truths while going into the roots of these formal legal studies.