He was influenced by his Leipzig professor Jakob Thomasius , who also supervised his BA thesis in philosophy .
Unlike Descartes and Spinoza , Leibniz had a thorough university education in philosophy .
Leibniz was influenced by Leibniz 's Leipzig professor Jakob Thomasius , who also supervised his BA thesis in philosophy .
Unlike Descartes and Spinoza , Leibniz had a thorough university education in philosophy .