Marx's philosophical views were forged in the intellectual ferment created by the Young Hegelian movement. The young radicals involved developed - or transformed - Hegel's philosophy into a series of progressive, humanist, republican, atheistical, socialist and ultimately communist positions. We will consider, amongst others, Ludwig Feuerbach's materialist humanism, Bruno Bauer's republican atheism, Moses Hess's ethical communism and Max Stirner's anarchistic individualism - as well as Marx's complex reactions to all these.