The sixth chapter focuses on a decisive common dimension in Gravity’s Rainbow, Mason & Dixon, and Against the Day, namely, their treatment of anthropocenic and planetary concerns. These related concepts have featured prominently in recent literary studies, but studies of Pynchon’s relation to the Anthropocene are still largely absent. Moreover, recent discussions in literary criticism of anthropocenic and planetary concerns are primarily centered on works published in the twenty-first century, but the chapter shows that the concerns are extensively prefigured in the early novels of Pynchon’s global trilogy. The notion of planetarity is often seen as incompatible with the idea of globalization, but the chapter shows that the anthropocenic and planetary themes in Pynchon’s novels grow naturally out of the global and world-historical issues discussed in Chapters 1–4. At the same time, it demonstrates that Pynchon’s ideas of humanity’s harmful exploitation of the planet draw on a long tradition in American literature and on the ecological ideas of the 1960s. The chapter concludes with an analysis of how Pynchon depicts language as a significant force in the Anthropocene, and with a discussion of the trilogy’s recurring portrayal of giants as ancient planetary avatars poised to reclaim the Earth.