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Historically, "philosophy" encompassed any body of knowledge. From the time of Ancient Greek philosopher
Other investigations closely related to art, science, politics, or other pursuits remained part of philosophy. For example, is
Since the 20th century, professional
Traditionally, the term "philosophy" referred to any body of
This division is not obsolete but has changed. Natural philosophy has split into the various natural sciences, especially astronomy, physics, chemistry, biology, and cosmology. Moral philosophy has birthed the social sciences, but still includes value theory (including aesthetics, ethics, political philosophy, etc.). Metaphysical philosophy has birthed formal sciences such as logic, mathematics and philosophy of science, but still includes epistemology, cosmology and others.
Many philosophical debates that began in ancient times are still debated today.