Book excerpt: Designed to complement the main themes of any introductory international relations course, Snow’s bestselling text presents original case studies that survey the state of the international system and look in-depth at current issues. The cases are extremely timely, geopolitically diverse, accessibly written, and of high interest and salience amidst today’s headlines. Cases cover enduring concepts like sovereignty, diplomacy, and national interest to emerging concerns like foreign election interference, the COVID pandemic, cybersecurity, and global climate change.