What is the science and activity of governing and social leadership?

"Politics" is the science and activity of governing and social leadership.

Explanation:

Political science is the indigenous, foreign and contextual analysis of politics and power. This involves understanding political ideas, philosophies, structures, strategies, procedures, and actions, including communities, classes, policy, diplomacy, law, tactics, and war. Methodologies involve positivism, interpretativism, philosophy of rational choice, behavioralism, post-structuralism, realism, institutionalism and pluralism.

As among the social sciences, political science utilizes tools and methods relating to the types of investigations sought:

Primary sources including historical and official records, Secondary sources including scientific journal articles, quantitative research, statistical analysis, case studies, experimental research, and model construction.