1.Niccolo Machiavelli (encouraged maintaining the balance of power by any means necessary, even force)
Niccolo Machiavelli made in-depth studies on the acts, strategies and thinking of many rulers of history and is considered one of the first and most famous precursors of political analysis. He observes that kings retain their power no matter how they do it or how much they must sacrifice to achieve it.
2. Karl Marx (envisioned a classless society, with common people in charge of their destiny)
Karl Marx considered that the society was divided between different social classes, mainly saw the difference between the employed workers (Working class) and the employer capitalists (Business class). His theory says that Entrepreneurs appropriate the Goodwill that is given by the profit of the entrepreneur in economic terms, and promoted that the workers take power over their lives and the economy reaching an egalitarian society for all.
3.John Milton (discussed the people's right to select and eliminate rulers)
John Milton defended the idea that it is the people who confer power to their rulers and therefore it is the people who have the authority to take power when they do not comply with the popular mandate.
