Western philosophy is the philosophical tradition of the Western world and dates to Pre-Socratic thinkers who were active in Ancient Greece in the 6th century BCE such as Thales (c. 624–546 BCE) and Pythagoras (c. 570–495 BCE) who practiced a "love of wisdom" (philosophia) and were also termed physiologoi (students of physis, or nature). Socrates was a very influential philosopher, who insisted that he possessed no wisdom but was a pursuer of wisdom.

Western philosophy can be divided into three eras: