Zeno of Citium (334 - 262 BC) was an Ancient Greek philosopher. He was the founder of the Stoic school of philosophy. Based on the moral ideas of the Cynics, Stoicism laid great emphasis on goodness and peace of mind gained from living a life of Virtue in accordance with Nature. It flourished as the dominant philosophy from the Hellenistic period through to the Roman era. He divided philosophy into three parts: Logic (rhetoric, grammar, and the theories of perception and thought); Physics (not just science, but the divine nature of the universe); and Ethics, the end goal of which was to achieve happiness through the right way of living according to Nature. He died around 262 BC. Laertius reports about his death: As he was leaving the school he tripped and fell, breaking his toe. Striking the ground with his fist, he quoted the line from the Niobe: "I come, I come, why dost thou call for me?" and died on the spot through holding his breath. Engraving by J.W. Cook, 1825.