If you believe in great man theory™ and think that all political developments happen because one person can magically steer entire countries and the world, in geo-political terms, or idealists in thinking that if you have the correct ideas, you can magically steer the entire rest of the world to whatever you think, by having the correct thoughts. Then your theories of political developments are non-materialist, like this comment is objecting to. The system sets the conditions of who is going to be empowered or rewarded for their actions and positions.