Rousseau
Plato and Paine are also outstanding
Hobbes is worth studying because he lays out how shyt will go down in a libertarian anarcho-capitalist utopia.
"..continual fear, and danger of violent death: and the life of man, solitary, poor, nasty, brutish and short."
Marx also is worth studying because of his lacerating critique of capitalism. Of course his proposed solution to the evils of capitalism was error-ridden and mistaken (and should no longer be taken seriously), but his analysis of capitalism is some

shyt. "
The worker becomes an ever cheaper commodity the more commodities he creates"
That's the big five in political philosophy for me. Plato, Rousseau and Paine have the vision for the future. Marx tells you what's wrong with things as they are. Hobbes tells you what will happen if you let this madness continue to get out of hand. As a set they're perfect.

at evil writers like Ayn Rand and Edmund Burke