Electrifying, provocative, and controversial when first published thirty years ago, Donna Haraway’s “Cyborg Manifesto” is even more relevant today, when the divisions that she so eloquently challenges—of human and machine but also of gender, class, race, ethnicity, sexuality, and location—are increasingly complex. The subsequent “Companion Species Manifesto,” which further questions the human–nonhuman disjunction, is no less urgently needed in our time of environmental crisis