The modern study of Comparative Politics emerged in the late nineteenth century, and since then has evolved largely due to the research in US universities. Comparative Politics is one of the three core components of political science, the other two being political theory and international relations. However, it was only in the twentieth century that comparative government and politics emerged as an important sub-field within the discipline of political science. Since then, it has undergone tremendous transformation in terms of its nature and ambit of study.

[Source: Orient Blackswan]