This is a first edition core text for freshman/sophomore-level courses on International Relations—the second largest course market in political science. Introduction to international politics courses typically have multiple goals. On the one hand, instructors seek to introduce students to the discipline through readings and discussions of foundational theoretical perspectives and ongoing debates. On the other hand, instructors seek to help students become informed participants in policy debates about foreign policy and international politics issues by highlighting pressing contemporary issues. Effectively addressing both concerns requires more than simply including both topics in the course syllabus or in a textbook. It requires making systematic linkages between theory and policy. This is a long standing challenge in international politics, one raised many years ago by Alexander George in Bridging the Gap in which he called for greater communication between academic scholars and practitioners. This text seeks to link theory and policy in an organized and efficient fashion that does not ignore or slight the conceptual discussion of international relations or simply chase newspaper headlines. Chapters are organized around “Global Challenges and Policy Responses.” The challenges are presented as concrete policy problems relevant to the theme of the chapter. The discussion of responses emphasize concrete actions being taken or proposed by international organizations, the foreign policies of key states, international agreements, and actions taken by NGOs. Theoretical insights are used to help students understand challenges, think about solutions, and learn from the past.