In this short, accessible book Layne and Thayer argue the merits and demerits of an American empire. With few, if any, rivals to its supremacy, the United States has made an explicit commitment to maintaining and advancing its primacy in the world. But what exactly are the benefits of American hegemony and what are the costs and drawbacks for this fledgling empire? After making their best cases for and against an American empire, subsequent chapters allow both authors to respond to the major arguments presented by their opponents and present their own counter arguments.

Pathbreaking and controversial, Darwin and International Relations offers the first comprehensive analysis of international affairs of state through the lens of evolutionary theory. Bradley A. Thayer provides a new method for investigating and explaining human and state behavior while generating insights into the origins of human and animal warfare, ethnic conflict, and the influence of disease on international relations. Using ethnological and statistical studies of warfare among tribal societies, Thayer argues that humans wage war for reasons predicted by evolutionary theory -- to gain...