This article draws a connection between closed-biosphere tropes in Kim Stanley Robinson's Icehenge (1984) and Soviet and American research on closed artificial ecologies. The article contends that during the 1980s, bioregenerative food systems—as research objects and literary tropes—expressed a perception of socialism and capitalism as imperfect yet eternal states. Two challenges are analogized: 1) conceiving political alternatives at the twentieth century's end, and 2) sustaining livable habitats using a closed ecology's limited available resources (for example, by deriving nutrients from waste). Both challenges inspire a mode of aggressive re-use here termed "strategic recycling." To close, the article assesses the ambivalent politics attending biospheric thinking: closed biospheres clarify humans' metabolic enmeshment in their environments, inviting the radical reassessment of organism-environment relations as ratios of useful outputs over required inputs (what one emits over what one eats). The resulting perspective carries both utopian and eugenic implications that make biospheric thinking itself a "recyclable" material that can be conscripted with equal ease into emancipatory and reactionary projects.