The document provides an overview of philosophy, including its definition and history. It defines philosophy etymologically as the love of wisdom, and as a search for meaning that consumes one's whole attention. Philosophy was born when early humans started wondering about their world. It has four main branches - logic, ethics, epistemology, and metaphysics. The document then outlines the major philosophers and schools of thought throughout history, from the pre-Socratic period to contemporary philosophers. It concludes by reflecting on students' preconceptions of philosophy and the subjects it concerns.