https://doi.org/10.1177/03098168221114386 Capital & Class 1–26 © The Author(s) 2022 Article reuse guidelines: sagepub.com/journals-permissions DOI: 10.1177/03098168221114386 journals.sagepub.com/home/cnc Whose climate intervention? Solar geoengineering, fractions of capital, and hegemonic strategy Kevin Surprise Mount Holyoke College, USA JP Sapinski Université de Moncton, Canada Abstract Proposals for slowing climate change by reflecting sunlight back to space, known as solar geoengineering (SG), are gaining traction in climate policy. Given SG’s capacity to slow warming without reducing carbon emissions, prominent criticism suggests that it will enable fossil fueled business-as-usual. This assessment is not without merit, yet the primary funders of SG research do not emanate from fossil capital. We analyze sources of funding for SG research globally, finding close ties to mostly US financial and technological capital as well as a number of billionaire philanthropists. These corporate sectors and associated philanthropies comprise part of ‘climate capital’ – the fraction of the capitalist class nominally aligned with climate action. We argue that SG is being positioned as a tactic for enabling incremental, market-driven decarbonization, explore key institutions advocating this approach in US climate policy, and conclude that SG is poised to serve as a tool for class compromise between fossil and climate capital. Keywords capitalist state, climate capitalism, ecomodernist ideology, fractions of capital, solar geoengineering Corresponding author: Kevin Surprise, Mount Holyoke College, 50 College Street, South Hadley, MA 01075, USA. Email: ksurpris@mtholyoke.edu 1114386CNC 0 0 10.1177/03098168221114386Capital & ClassSurprise and Sapinski research-article 2022 Article