Time and characteristics of several stages in the development of western philosophy history

I think there are about three stages in the history of western philosophy. One is that during Aristotle and Plato, various philosophical schools sprouted. The second is the period of scholasticism in Europe, represented by theology, Bacon, Hegel, Kant and Rousseau, which deeply discussed the ontology and ontology of the world and many ethical things. The third period is the modern postmodern period represented by existentialism. Emphasizing and discussing the significance of existence focuses on individual experience and returning to people's hearts, because almost all major philosophical problems were completed in the second period, and the third period is the so-called negation of negation. Now, from my personal point of view, there are no philosophers in the East and the West.