Michael Mann is one of the most influential sociologists of our time. His four-volume Sources of Social Power, the final volume of which was only recently completed, changed the way we think about power and rewrote the history of human societies. Anyone interested in understanding how the modern world was formed, how we got to where we are today, and where we are likely to go next cannot afford to ignore this modern classic. A transcript of conversations with British political sociologist John Hall, this small and accessible book provides an ideal introduction to the work and ideas of one of the most original sociologists of the 21st century. Students and scholars will find this book invaluable, and general readers will find it a clear, insightful, and masterful overview of the key challenges we will face in the coming years and decades.