Political scientists study the structure and theory of government and seek practical and theoretical solutions to political problems. Most current studies and research concentrate on tangible topics such as welfare reform, political campaigns and elections, foreign relations, and immigration. The vast majority of political scientists are teachers at colleges and universities where they conduct research and write books and articles on political theory. Political scientists armed with the practical and theoretical knowledge of government may enter political life. They generally do not run for public office, but very often their expertise is enlisted by candidates to ensure a successful run or reelection. A great many become political aides, helping those elected analyze and interpret legislative issues and their constituencies. Some become political commentators on television and radio or write columns for newspapers; others become public opinion pollsters.
https://www.princetonreview.com/careers/122/political-scientist

Karl Marx, Adam Smith, Jean Blondel, Emily Greene Balch, Hannah Arendt, Thomas Hobbes, and Niccolò Machiavelli were all influential political scientists of their time.