Max Stirner was one of the most important and seminal thinkers of the mid-nineteenth century. In the shadows of Hegel, Stirner developed possibly the most radical and devastating critique ever of the discourses of modernity, incurring the ire of Marx, prefiguring Nietzsche, and having a major (though often unacknowledged) impact on diverse streams of thought, from existentialism to anarchism and autonomism, literary and artistic avant-gardes, and postmodern theory.