John Weeks (1941-2020) was one of the most prominent Marxist economists of his generation. His writings inspired many activists and socialist economists around the world. This book brings together a selection of his writings engaging with and developing the Marxist tradition. These essays examine theoretical issues, directly building on Karl Marx's work, as well as practical and political issues, engaging with transformative and revolutionary activity. The essays included in this book are now made available to a new generation of critics of capitalism.