That's not human nature, since there is no abstract human nature! Human beings are social animals, it's all about “social relation!” It's all about conditions of the real material world. The slavery, feudalism or capitalism are not an arbitrary choices of human beings, they are social relations changing with class struggle! Why no powerful person or group wants to enslave, literally enslave, others? because this way, they make more profit! It is all about profit in the capitalism.