What does it mean to adopt a realist, or a world systems, or a green approach to international relations? Does the plethora of “isms” have any relevance to the real world of global politics and policymaking? Making Sense of International Relations Theory addresses these questions by illustrating theories in action. With the 2003 invasion of Iraq by the US and its allies as a common point of reference, each contributor presents a particular framework for interpreting world affairs. This structure offers students tangible examples of how theory is used in practice and at the same time highlights the explanatory differences among theories. Incorporating extensive introductory sections, the book is uniquely designed to explore alternative ways of understanding current events—to assist students in making sense of, as well as with, IR theory.