Treatments of collective action in political science, classical Greek history, and democratic theory often focus on the episodic and public-facing dimensions of dissent. This article turns to Aristotle for an account of solidaristic political action whose scale and tempo is sometimes obscured by such engagements. Revisiting The Athenian Constitution’s account of the tyrannicides of 514 BCE and the democratic revolution of 508/7 BCE, I argue for the centrality of comradeship to Aristotle’s discussions of these episodes. I demonstrate that Aristotle’s attention to the politics of comradeship is also legible in Politics 5—which notes the dangers political clubs (hetaireiai) pose to tyranny—as well as Aristotle’s references to comrades (hetairoi) in the Nicomachean and Eudemian Ethics. This article contributes to our understanding of the birth of Athenian democracy and how comradeship—a vice, to Aristotle, under ordinary political circumstances—becomes a virtue.