This review article argues that styles of thinking and writing recently encouraged in the environmental humanities are not conducive to analytical clarity, theoretical rigor, or effective critique of the practices and discourses that generate global inequalities and unsustainability. Critically discussing how global environmental change is being approached in anthropology and other human sciences, it concludes that the haziness, inconsistency, and inaccessibility of so-called posthuman deliberations on the Anthropocene ultimately serve to promote the destructive economic forces that are responsible for such change. A recent attempt to bring together approaches from posthumanism and Marxism is also deeply flawed, failing to present a coherent theoretical outlook on the environmental history of capitalism. The article argues for more responsible efforts to build interdisciplinary theory of the Anthropocene.