This paper delves into the work of Clive L. Spash, a British radical ecological economist well-known in his field who currently holds a professorship at the Vienna University of Economics and Business. We start with an examination of the principles of his “social ecological economics.” We then critically evaluate his attack on economic growth and his perspective on the standard economic models of climate change. Lastly, we explore his approach to science as a theoretical pursuit and his policy recommendations. The first version of this paper was given as a keynote lecture at the 7th Austrian Economics Meeting Europe , May 12-13, 2023, Université Catholique de l’Ouest, Angers, France, and a second version at the Summer University in Political Economy , July 20-22, 2023, Aix-Marseille University, France. I wish to thank the organizers of these conferences, and also the anonymous referees whose remarks have been taken into account to improve the paper.