On January 9th 2025 I delivered a paper to the Political Economy Seminar Series in the Department of Politics and International Studies at the School of Oriental and African Studies in London. The paper was called, 'Intellectual Border Transgressions in a World of Economics Imperialism: The Epistemic Limits of Mathematical Market Models as Social Science Explanations'. More generally, I spoke about my new book, False Prophets of Economics ImperialismLink opens in a new window, concentrating in particular on the epistemic trespassing that is involved in treating non-market social relations as if they map neatly onto the terrain of mathematical market models.