Over the past quarter-century, Fred Halliday has distinguished himself as a prolific and insightful scholar of international affairs. He has imbibed a generous dose of Marxist theory without being intoxicated by it, and one might say the same for his consumption of other types of theory as well. Not content to be an armchair academic, Halliday is personally acquainted with a number of revolutionary movements and his writings combine an obvious sympathy for their aspirations with a clear-eyed sense of their shortcomings. The result is a combination of intellectual range and personal experience that is nearly unique among contemporary scholars of world politics.