Hi,
It’s not an easy topic. Some of my poor viewpoints. 
We’ve learnt so much from the histories, which tell us there couldn’t be any society without the hierarchy. Like what is given by the theory of evolution, every unit or society will develop from the low class to the higher grade. Then, it is inevitable that stronger ideologies would take the first place in their units.
We should hold an objective attitude to the hierarchy. Even in the animal world we could still see some rules of domination, but human activities are much more complicated than those animals. Our ancient ancestors found easy ways to comb all kinds of relationships, maybe they didn’t call that “Hierarchy” , but for ages and centuries it had been shaped so well , and seemingly had been ingrained in our minds . The governors use it as the tool for their sovereignty, from this point, “Hierarchy” seems to have a dark and gloomy face, thus people argued about its rationality, but let’s look back and we will find how similar the history is , we just use another new "hierarchy " instead of those old ones . With times passing by , our life styles , our thoughts and ideas , our activities and behavious have been changed so much, nowadays when we talk it over again, we would ask ourselves, “is it a new world?” which brings us full freedom and democracy? Hard to answer, because as long as the human activities exist the "hierarchy " wouldn’t disappear, it just have a new look, today we may call it as the “System”, because this word includes most of its meanings. reflecting its nature in this new era.
We need it to build an orderly unit in which everyone has his rights and responsibilites. In other words, he can’t do everything without any restriction. When that system works we will feel a kind of harmony, but on the contrary , you may think it unfair because of those excessive requests. Specially when you are asked by someone who is just your boss(and you dislike him a bit) , so , can you say it is a sort of “hierarchy”? ok, you can make a choice, go or stay , because it is the Work! Then how about things in family? You can’t leave only because of a terrible quarrel with your parents. so, is it the “hierarchy” ,too?? We have to admit that the relationships of human should be the hardest to deal with. Because we have emotions which control our behavious . " Hierarchy " or “System” is used to keep the balance and harmony. Of course, we should learn to be good at it(though it is so hard always), Whatever in business or family, whatever in bigger units like countries or other societies, we need “hierarchy” or “system” .
The problem is , how to build a good working “system” ? Being lack of “hierarchy” people could live happily and freely? No, at least we didn’t see its victory in Utopian. But much could be taken as bad rules, which aren’t feasible today, specially under the control of the Freedom and Democracy . “Hierarchy” or “System” is left to others who would be the brave and hard explorers.