History suggests that capitalism is a necessary condition for political freedom

What kind of society isn't structured on greed? The problem of social organization is how to set up an arrangement under which greed will do the least harm; capitalism is that kind of a system

Self-interest is not myopic selfishness. It is whatever it is that interests the participants, whatever they value, whatever goals they pursue. The scientist seeking to advance the frontiers of his discipline, the missionary seeking to convert infidels to the true faith, the philanthropist seeking to bring comfort to the needy - all are pursuing their interests, as they see them, as they judge them by their own values.

History suggests that capitalism is a necessary condition for political freedom. Clearly it is not a sufficient condition.

The problem of social organization is how to set up an arrangement under which greed will do the least harm, capitalism is that kind of a system.

Well first of all, tell me, is there some society you know of that doesn't run on greed? You think Russia doesn't run on greed? You think China doesn't run on greed? What is greed?