In 1941, Eli Siegel, American philosopher and poet, founded Aesthetic Realism, the philosophy that reality itself is aesthetic, and that "The world, art, and self explain each other: each is the aesthetic oneness of opposites." Various attempts have been made to define Post-Modern Aesthetics.
Epistemology is the investigation into the nature of knowledge itself. The study of epistemology focuses on our means for acquiring knowledge and how we can differentiate between truth and falsehood. Modern epistemology generally involves a debate between rationalism and empiricism.
Metaphysics is a branch of philosophy exploring the fundamental nature of reality. While various views and methods have been called 'metaphysics' across history, this article approaches metaphysics first from the perspective of contemporary analytical philosophy, and then explores metaphysics in other traditions.
Political philosophy, or political theory, is the study of topics such as politics, liberty, justice, property, rights, law, and the enforcement of laws by authority: what they are, why (or even if) they are needed, what, if anything, makes a government legitimate, what rights and freedoms it should protect and why, what form it should take and why, what the law is, and what duties citizens owe to a legitimate government, if any, and when it may be legitimately overthrown, if ever.