Read history books, like a biography of Julius Caesar. Read critical theory like the Communist Manifesto and read about the work of Foucault. Read critical hi

Read history books, like a biography of Julius Caesar. Read critical theory like the Communist Manifesto and read about the work of Foucault. Read critical history books like Why Nations Fail and A People's History of the United States by Howard Zinn. Some philosophy like Aristotle's Politics, Kant's categorical imperative and Rawl's veil of ignorance are also helpful I think.