Albeit in different ways, both Autonomist Marxists and Post-Marxists have proposed radical democratic theories. To Autonomist Marxists, the latest advances in capitalism would pave the way for global democracy. To Post-Marxists, the plurality of social movements would push society towards a radical model of democracy. Despite their contributions, both Autonomist Marxism and Post-Marxism have left underdeveloped the possibility that digital, affective capitalism could push society towards the opposite direction of global and radical democracy. This article explores the hypothesis that contemporary capitalism may have given birth to a multitude that aims at consolidating White, Western, and masculine supremacy. It argues that fantasies that have, for centuries, sustained the racist, xenophobic, and sexist ideological dimensions of capitalism have brought together multiple groups and individuals that have engaged in the collaborative production of conspiracy theories conveying the common belief that an idealised White/Western identity is under attack: the alt-right multitude. By merging part of the key features of the multitude proposed by Autonomist Marxists with what is known as a ‘Žižekian-Lacanian-Post-Marxist theory’, this article stages a dialogue between both schools of thought, opening new directions for research on how capitalism intersects with issues of race, ethnicity, and gender.