"This is the definitive source on Kant’s international relations theory and it has played a significant role in informing my own thinking. Updated and expanded, this new edition adds considerable material to an already powerful first edition, including an expanded analysis of Kant’s practical politics, his thinking in response to his contemporaries, key political and legal methodological considerations, and how Kant might be best understood within modern global debates."

Garrett Wallace Brown, University of Leeds

"Georg Cavallar’s new book is a skillful and sophisticated linking of Kant’s theory to humanitarian intervention, democracy and peace, cosmopolitanism and patriotism, among other topics. An original argument is refined by a serious and impressive engagement with two decades of debate framed by the book’s first appearance in 1999."

Antonio Franceschet, University of Calgary

"When the first edition of this book came out just over two decades ago it quickly became a must-read for anyone who was interested in Kant’s ideas about the theory and practice of international relations. This new edition brings it up to date, and adds material that will make it a necessary reference in the decades to come."

John Christian Laursen, University of California, Riverside