The Young Hegelians (German: Junghegelianer), later known as the Left Hegelians (German: Linkshegelianer), were a group of German intellectuals who were active from the late 1830s to the mid-1840s. Their thought represented a radicalization of Georg Wilhelm Friedrich Hegel's philosophy, moving from the analysis of religion to critiques of politics and society that laid the groundwork for socialism and Marxism. A central feature of their work was a critique of what they saw as the intertwined religious, philosophical, and political dogmas of "personalism". The collapse of Hegelian philosophy in the face of political and social realities led the Young Hegelians to formulate the first modern theory of ideology—the idea that abstract thought functions as a justification for or compensation for a deficient social reality.

Centered at the University of Berlin, the group initially focused on theological questions, galvanized by David Strauss's controversial book The Life of Jesus (1835), which treated the Gospels as mythological expressions of the early Christian community's consciousness rather than as historical fact. This led to a split in the Hegelian school between the conservative "Right Hegelians" who defended the compatibility of Hegel's philosophy with orthodox Christianity and the radical "Young Hegelians" who drew increasingly atheistic and anti-religious conclusions.

The movement's leading figures included Bruno Bauer, Ludwig Feuerbach, Moses Hess, and Max Stirner. Bauer developed a philosophy of "self-consciousness" and "criticism" that rejected all religious and external authority. Feuerbach's influential work The Essence of Christianity (1841) argued that God was merely a projection of humanity's own alienated "species-essence", a concept that profoundly influenced his contemporaries, including the young Karl Marx. Under the editorship of Arnold Ruge, journals such as the Hallische Jahrbücher became the movement's main organs, evolving from literary and theological concerns to direct political opposition against the Prussian state.

The Young Hegelians' radicalism intensified after 1840, but government repression, particularly the dismissal of Bauer from his academic post in 1842 and widespread press censorship, led to the movement's rapid fragmentation. In its final phase, Max Stirner's The Ego and Its Own (1844) pushed the critique to its nihilistic conclusion by rejecting not only God and the state but also Feuerbach's concept of "Man" in favor of the unique, sovereign ego. Simultaneously, figures like Moses Hess and Karl Marx began applying the Hegelian-Feuerbachian concept of alienation to economics, transforming the movement's philosophical radicalism into the foundations of communism. By the end of 1844, the Young Hegelian movement had dissolved as a coherent force, its intellectual trajectory logically exhausted by 1846 with the work of Karl Schmidt. Nevertheless, it decisively shaped the development of Marxism and other radical philosophies.

Following Georg Wilhelm Friedrich Hegel's death in 1831, his disciples initially worked to preserve and elaborate his philosophical system, which had become dominant in Germany. Based in Berlin, Hegel's closest followers founded the Hegelian periodical Jahrbücher für wissenschaftliche Kritik and began preparing a complete edition of his works. The prevailing view was that Hegel's philosophy was the final and ultimate system, leaving his pupils to work out its implications in various fields. This initial phase was marked by debates over the metaphysical worth of the Hegelian system, with conservative figures like Carl Friedrich Göschel defending its orthodox implications.

However, ambiguities within Hegel's own writings, particularly concerning religion, soon led to internal divisions. While Hegel had described Christianity as the "absolute" and "perfect" religion, his framework, in which philosophy and religion shared the same content but differed in form (philosophy using concepts, religion using images), left room for conflicting interpretations. Some of his statements suggested that God's knowledge of himself was simply humanity's self-consciousness, a theme the Young Hegelians would later develop. The most debated questions were the immortality of the soul and the personality of God. This "controversy over personality" became the central point of intersection for the theological, political, and social debates that would define the Young Hegelian movement.

The split was catalyzed by the publication of David Strauss's Das Leben Jesu (The Life of Jesus) in 1835. Strauss, a student of the Tübingen school, argued that the Gospel narratives were not historical accounts but "myths" produced by the collective consciousness of the early Christian community to express its profound desires. This implied that the incarnation of the divine was not limited to a single individual but was realized in humanity as a whole. The book caused an immediate and profound controversy, drawing attacks from orthodox Lutherans and from those Hegelians who wished to maintain the master's reconciliation of philosophy and Christianity. Strauss's critique of the personal Christ intensified the ongoing polemics about the "personality of God" and brought the political dimension of these theological debates to the forefront.

It was Strauss himself who, borrowing from the seating arrangement of the French parliament, first categorized the divisions within the Hegelian school. He labeled those who believed the Gospel narratives were fully compatible with Hegel's philosophy as the Right Hegelians (or the "Old Hegelians"). Those who, like himself, believed only parts were compatible formed the Centre. Those who concluded that Hegel's philosophy and Christian dogma were fundamentally irreconcilable became the Left Hegelians or Young Hegelians. Initially, these divisions were almost exclusively theological. The Young Hegelians' first collective project was a radical critique of established religion.