Georg Wilhelm Friedrich Hegel (; German: [ˈɡeːɔʁk ˈvɪlhɛlm ˈfʁiːdʁɪç ˈheːɡl̩]; 27 August 1770 – 14 November 1831) was a German philosopher. He is one of the most important figures in German idealism and one of the founding figures of modern Western philosophy. His influence extends across the entire range of contemporary philosophical topics, from metaphysical issues in epistemology and ontology, to political philosophy, the philosophy of history, philosophy of art, philosophy of religion, and the history of philosophy.

Born in 1770 in Stuttgart during the transitional period between the Enlightenment and the Romantic movement in the Germanic regions of Europe, Hegel lived through and was influenced by the French Revolution and the Napoleonic wars. His fame rests chiefly upon The Phenomenology of Spirit, The Science of Logic, and his lectures at the University of Berlin on topics from his Encyclopedia of the Philosophical Sciences.

Throughout his work, Hegel strove to address and correct the problematic dualisms of modern philosophy, Kantian and otherwise, typically by drawing upon the resources of ancient philosophy, particularly Aristotle. Hegel everywhere insists that reason and freedom are historical achievements, not natural givens. His dialectical-speculative procedure is grounded in the principle of immanence, that is, in assessing claims always according to their own internal criteria. Taking skepticism seriously, he contends that we cannot presume any truths that have not passed the test of experience; even the a priori categories of the Logic must attain their "verification" in the natural world and the historical accomplishments of mankind.

Guided by the Delphic imperative to "know thyself," Hegel presents free self-determination as the essence of mankind – a conclusion from his 1806-07 Phenomenology that he claims is further verified by the systematic account of the interdependence of logic, nature, and spirit in his later Encyclopedia. It is his claim that the Logic at once preserves and overcomes the dualisms of the material and the mental – that is, that it accounts for both the continuity and difference marking of the domains of nature and culture – as a metaphysically necessary and coherent "identity of identity and non-identity."

Hegel's thought continues to exercise enormous influence across a wide variety of traditions in Western philosophy.