Theory Talks proudly presents a Talk with historical sociologist Immanuel Wallerstein. Wallerstein is duly known for his world-system theory, with which he offers a critical alternative to realist systemic approaches to International Relations. One could say that where Realists part from the system to analyze and predict history, world-system theory parts from history to analyze and predict the system. In this comprehensive Talk, Wallerstein – amongst others – explains why capitalism is worn out, why ’68 was more important then ’45 or ’89, and why we need to overcome artificial divorces between different arenas in social sciences and, more generally, between philosophy and science.