An argument that humanists have the tools-and the responsibility-to mobilize political power to tackle climate changeAs climate catastrophes intensify, why do literary and cultural studies scholars so often remain committed to the separation of aesthetic study from the nitty-gritty of political change? In this thought-provoking book, Caroline Levine makes the case for an alternative view, arguing that humanists have the tools to mobilize political power-and the responsibility to use those tools to avert the worst impacts of global warming. Building on the theory developed in her award-winning book, Forms, Levine shows how formalist methods can be used in the fight for climate justice.Countering scholars in the environmental humanities who embrace only "modest gestures of care"-and who seem to have moved directly to "mourning" our inevitable environmental losses-Levine argues that large-scale, practical environmental activism should be integral to humanists' work. She identifies three major infrastructural forms crucial to sustaining collective life: routines, pathways, and enclosures. Crisscrossing between art works and public works-from urban transportation to television series and from food security programs to rhyming couplets-she considers which forms might support stability and predictability in the face of growing precarity. Finally, bridging the gap between academic and practical work, Levine offers a series of questions and exercises intended to guide readers into political action. The Activist Humanist provides an essential handbook for prospective activist-scholars.