How did Ludwig Feuerbach influence Karl Marx’s move toward materialism?

Ludwig Feuerbach played a pivotal role in Karl Marx’s transition from Hegelian idealism to his own materialist framework. In his influential work The Essence of Christianity (1841), Feuerbach criticized G.W.F. Hegel by arguing that the "Absolute Spirit" was not the primary reality, but rather an illusory projection of "the real man standing on the foundation of nature."1

Feuerbach’s approach helped Marx move toward materialism by emphasizing that human beings are natural, physical entities whose consciousness is determined by their existence and material needs, rather than the other way around. Marx adopted this materialist standpoint to critique the Hegelian view that mind or spirit was superior to matter.21

While Marx was deeply influenced by Feuerbach’s analysis of alienation and his rejection of religious idealism, he eventually sought to combine Feuerbach’s materialism with Hegel’s dialectic. Furthermore, Marx diverged from Feuerbach by arguing that religion and social alienation could not be overcome through philosophical critique alone, but required revolutionary changes in the material and economic conditions of society.21