Friedrich Engels' Feuerbach: The Roots of the Socialist Philosophy is a searching account of how modern socialist thought grew out of German philosophy and revolutionary upheaval. Written in the wake of 1848 and shaped by the lifelong partnership of Marx and Engels, it traces the collapse of post-Hegelian idealism, the importance and limits of Feuerbach, and the emergence of historical materialism as a new way of understanding society, religion, and politics. Engels looks back on the unfinished project he and Marx began in 1845, explaining their break with Hegelian philosophy and the need to clarify socialism's intellectual foundations after Marx's death. He praises Feuerbach for helping dismantle Hegel, yet criticizes his abstract morality and human-centered idealism for ignoring the real historical and social conditions of life. The book culminates in Marx's famous theses on Feuerbach, where human beings are defined through practice and social relations, and philosophy is challenged to move beyond interpretation toward change. This edition has been fully restored with modern typesetting, custom cover design.