Philosophy is the love of knowledge. It was invented independently by the great civilizations. In Western civilization the Greeks were the ones who invented them. Among the most famous philosophers there was Socrates, Plato, and Aristotle. Plato talked about love in his dialogue The Symposium
Philosophy is the widest possible subject matter than humans have created. It litterally includes everything. The difference sciences have split of from philosophy in the last 200 years, but many of its most foundational ideas are still within the grasp of philosophy. Philosophy includes all of the science, ethics, exploring the nature of reality, and a lot more.
Although amusing, philosophy can be a dangerous hobby. Many people have developed a strong case of melancholy, especially if they read the works of Schopie. Other people develop abstraction, which can lead to the perilous case of getting a attraction to mathematics. Many people also report losing their religion