In this provocative work, Samuel Mines addresses the pressing question of Earth’s ecological limits, presenting a sobering analysis of human impact on the environment and the potential for species-wide decline. Rooted in the scientific and social debates of the early 1970s, the book offers a comprehensive assessment of resources, population, pollution and sustainability, engaging with themes of environmental crisis, extinction risk, and the ethics of human stewardship of nature. By blending accessible exposition with critical urgency, it occupies an important place in the early literature of the environmental movement and remains relevant for scholars of ecological thought and environmental policy.