Este segundo volumen, dedicado a «La lógica subjetiva», constituye la tercera y última parte de la Lógica de Hegel, «La doctrina del concepto» (1816), en la que éste se revela como la verdad de sus momentos anteriores, el ser y la esencia (volumen I), que quedan de este modo englobados en él como fases de su propio devenir.
Georg Wilhelm Friedrich Hegel (1770-1831) was a German philosopher and one of the founding figures of German Idealism. Influenced by Kant's transcendental idealism and Rousseau's politics, Hegel formulated an elaborate system of historical development of ethics, government, and religion through the dialectical unfolding of the Absolute. Hegel was one of the most well-known historicist philosopher, and his thought presaged continental philosophy, including postmodernism. His system was inverted into a materialist ideology by Karl Marx, originally a member of the Young Hegelian faction.