John Mearsheimer is one of the most famous realist international relations theorists in academia today. In this interview, he responds to some trenchant questioning about his views of U.S. foreign policy and grand strategy vis-a-vis Russia, Ukraine, and NATO in the context of the current war. The conversation touches on other aspects of U.S. post-Cold War foreign policy. This project endeavors to bring the voices and scholarship of academia to the attention of policymakers with the implicit idea that it will help make better policy. As such, we try to keep a light editorial touch. However, readers may note that some of Professor Mearsheimer's answers are a bit divorced from real policymakiing exigenicies in places. Adhering to the "light" touch approach, we leave it to readers to take this in and make their own assessments.