Which one for the first thinkers to form Free will in antiquity was also well-known for formulation of an atomic theory of the universe?
Democritus Democritus ( ; Greek: Δημόκριτος , "Dēmókritos", meaning "chosen of the people"; c. 460 – c. 370 BC ) was an influential Ancient Greek pre-Socratic philosopher primarily remembered today for his formulation of an atomic theory of the universe.
Western philosophy Western philosophy is the philosophical thought and work of the Western world. Historically, the term refers to the philosophical thinking of Western culture, beginning with Hellenic (i.e. Greek) philosophy of the Pre-Socratics such as Thales (c. 624 – c. 546 BC) and Pythagoras (c. 570 – c. 495 BC), and eventually covering a large area of the globe. The word "philosophy" itself originated from the Hellenic: "philosophia" (φιλοσοφία), literally, "the love of wisdom" (φιλεῖν "philein", "to love" and σοφία "sophia", "wisdom").