Political science is a branch of social science concerned with theory, description, analysis and prediction of political behavior, political systems and politics broadly-construed.
Political scientists study the allocation and transfer of power in decision-making, the roles and systems of governance including governments and international organizations, political behavior and public policies. They measure the success of governance and specific policies by examining many factors, including stability, justice, material wealth, and peace. Some political scientists seek to advance positive theses by analyzing politics. Others advance normative theses, by making specific policy recommendations.