I'd love to know your definition of "natural law." Is that might is right, law of the jungle, or some other perverted version? We are not supposed to be governed by animal instincts. Instead, we are supposed to be governed by reason. It is reasonable to not have rulers or a ruling class. It's also reasonable to have everyone, regardless of who they are, how old they are, or how rich they are, equal under the law--the law being simple and based off broken contracts, damage to people, or damage to their property.