Utopias and their signification in history of philosophy

This diploma work discusses the meaning and signification of utopias in Philosophy. The paths they have passed through history of humankind. My thesis is the progress utopias have taken through our history. The consequence which they have had for different periods. Also, I want to show in my diploma work that there is couple of things, which are integrating and unifying for all utopias. The same views, pictures, ideas, we can use to unify them and with that we can compare. Not just the different utopias in the same period, but all the utopias through the human-history