In this article, I examine the anti-capitalist and antidevelopment politics that Diné resisters espouse in their critiques of resource extraction in the Navajo Nation. I argue that existing anthropological and historical studies about Diné resistance minimize the specifically anti-capitalist character of this resistance by erasing the capitalist underpinnings of development. I draw from Indigenous feminists, Native studies scholars, and Diné land defenders to argue that development in the form of resource extraction is a violent modality of capitalism that seeks to kill Diné life. In response to this death drive, Diné resisters have created a politics of relational life to challenge and oppose development. I examine the historical and material conditions that have given rise to this politics of relational life and suggest its central role in invigorating anti-capitalist decolonization struggles.