Why is the traditional culture of the concept of hierarchy is very heavy, people are not equal to each other, to this and that?

There is no absolute fairness between people, there are many bad habits in the ancient traditional culture, the king and the ministers are divided into three, six, nine, as a way to maintain the hierarchical order, the evolution of thousands of years or a lot of culture has been retained. Now that the order of money has become the supremacy of capital, the darkness and hypocrisy of the human heart will eventually be magnified.