An inconvenient mandate: Margaret Thatcher, neoliberalism, and the politics of climate change, 1987-90

Between 1987 and 1990, Margaret Thatcher became one of the most high-profile world leaders to warn publicly of anthropogenic climate change. This article argues that her apparent 'green turn' was not a moral conversion or a departure from Thatcherism, but a strategic adaptation of it. Drawing on declassified Prime Minister's Office files, Cabinet correspondence, and private papers, it shows that climate policy was shaped through a 'neoliberal filter' that favoured responses compatible with fiscal discipline, technological modernization, and market logics. As a result, ministers supported climate modelling, international forestry initiatives, and above all the renewed case for nuclear power, while resisting structural remedies-most notably carbon taxation-that threatened industrial competitiveness, economic growth, or political consent. Reconstructing key episodes-including the 1989 Downing Street Climate Seminar and the 1990 white paper This Common Inheritance-the article exposes the internal hybridity of late Thatcherism: a governing project able to appropriate the language of planetary responsibility while resisting measures that threatened the neoliberal political economy forged during the 1980s. In doing so, it reinterprets Thatcher's final term as one of pragmatic yet sharply delimited adaptability, revealing both the possibilities and the limits of neoliberal environmentalism at the close of the twentieth century.