Georg Wilhelm Friedrich Hegel (27 August 1770 – 14 November 1831) was a German philosopher and a major figure in the tradition of German idealism. He is one of the most important figures in modern Western philosophy, with an influence that extends across a wide range of topics from metaphysical issues in epistemology and ontology, to political philosophy and the philosophy of art and religion.

Born in Stuttgart, Hegel's life spanned the transitional period between the Enlightenment and the Romantic movement. His thought was profoundly shaped by the French Revolution and the Napoleonic wars, events which he famously interpreted from a philosophical perspective. His academic career culminated in his position as the chair of philosophy at the University of Berlin, where he remained a dominant intellectual figure until his death in 1831.

Throughout his work, Hegel strove to correct what he argued were untenable dualisms endemic to modern philosophy. His principal achievement was the development of a comprehensive philosophical system, often termed absolute idealism, to account for reality as a unified whole. Central to this system is the concept of "spirit" (Geist), which Hegel presented as humankind coming to know itself through a historical process of rational development. Hegel's characteristic procedure, often termed dialectical or speculative, assesses concepts and forms of consciousness according to their own internal criteria, revealing their contradictions and one-sidedness. This leads to their resolution in a higher, more comprehensive unity which both cancels and preserves the initial stage. His major works, including the Phenomenology of Spirit (1807) and the Science of Logic (1812–1816), detail this systematic vision. In his political philosophy, he famously asserted that "world history is progress in the consciousness of freedom."

Hegel's influence has been profound and divisive. After his death, his followers split into rival "Right" and "Left" Hegelian camps. The Left, including Ludwig Feuerbach and Karl Marx, adapted his dialectical method for their materialist critiques of religion and society. In the twentieth century, his thought was further developed in traditions such as French Hegelianism and critical theory, and became a major point of reference for existentialism.