She moved to the US in 1967 to study for a PhD in philosophy at the University at Buffalo with support from a Fulbright scholarship. She taught at the University of Port Harcourt in Nigeria, and was Associate Professor and later Professor of Political Philosophy and International Studies at New College of Hofstra University. She was co-founder of the International Feminist Collective, and an organizer with the wages for housework campaign. In 1973, she helped start Wages for Housework groups in the US. In 1975 she published Wages Against Housework, the book most commonly associated with the wages for housework movement. She also co-founded the Committee for Academic Freedom in Africa (CAFA), and was involved with the Midnight Notes Collective. In 1995, she co-founded the Radical Philosophy Association (RPA) anti-death penalty project. Federici lives in Park Slope, Brooklyn, with her partner George Caffentzis. In March 2022, Federici was amongst 151 international feminists signing Feminist Resistance Against War: A Manifesto, in solidarity with the Feminist Anti-War Resistance initiated by Russian feminists after the Russian invasion of Ukraine. Scholarly contributions Federici's best known work, Caliban and the Witch: Women, the Body and Primitive Accumulation, expands on the work of Leopoldina Fortunati investigating the reasons for the witch hunts of the early modern period, but giving a feminist interpretation. In it, she argues against the popular interpretation of Karl Marx's concept of primitive accumulation which is often viewed as a necessary precursor for capitalism. Instead, she posits that primitive accumulation is a fundamental characteristic of capitalism itself—that capitalism, in order to perpetuate itself, requires a constant infusion of expropriated capital. Federici connects this expropriation to women's unpaid labour, both connected to reproduction and otherwise, which she frames as a historical precondition to the rise of a capitalist economy predicated upon wage labor. Related to this, she outlines the historical struggle for the commons and the struggle for communalism. Instead of seeing capitalism as a liberatory defeat of feudalism, Federici interprets the ascent of capitalism as a reactionary move to subvert the rising tide of communalism and to retain the basic social contract. She situates the institutionalization of rape and prostitution, as well as the heretic and witch-hunt trials, burnings, and torture at the center of a methodical subjugation of women and appropriation of their labor. This is tied into colonial expropriation and provides a framework for understanding the work of the International Monetary