Louis Althusser is the great absent figure in contemporary leftist theory: although his name is rarely mentioned, the concepts he developed can be found everywhere—from overdetermination to ideological state apparatuses. It is time to bring him back to where he belongs: at the center of our theoretical struggles. Slavoj Žižek. Louis Althusser's 1965 volume "Pour Marx" (translated as "For Marx," published in German in 1968 by Suhrkamp) revolutionized leftist theory. Althusser broke with the economic determinism of his time and analyzed capitalist domination as a relationship in which the oppressed are also entangled. His thoughts on overdetermination, as well as his later ideas on the "addressing" of the subject, the "ideological state apparatuses," and philosophy as "class struggle in theory," have influenced figures such as Judith Butler.