Stephen Walt details why both the European Union and NATO are important to U.S. interests. 

Stephen Walt writes that most people in the developed world are no less safe today than they were a year ago. What he fears is the steady erosion of existing institutions and norms inside the societies that are still relatively safe and fairly tranquil.

Stephen Walt outlines why treating foes as inherently irrational has real costs, such as making preventive war seem like a more attractive option than either diplomacy or deterrence.

Stephen Walt critiques Donald Trump's approach to foreign policy.

If you think like a realist, many confusing aspects of world politics become easier to understand, writes Stephen Walt.

Stephen Walt provides a brief history of foreign-imposed regime change and its consequences.

Stephen Walt writes that Donald Trump's goal in withdrawing the United States from the JCPOA is to prevent Iran from establishing normal relations with the rest of the world.

Stephen Walt discusses the efforts of Germany, France, and the U.K to persuade Trump to stay in the JCPOA.

Stephen Walt writes that a successful summit just might be possible if both sides agree on the answers to these three questions: Does the agreement reduce the danger of war?; Is the agreement likely to last?; and How will an agreement affect the U.S. security position in Asia? 

Stephen Walt elaborates on why there is reason to think Donald Trump is becoming a closet realist or even an offshore balancer. However, he also writes that Trump  seems to grasp part of the logic — it's better to let others contend than to do the heavy lifting yourself — but he lacks the knowledge, skill, and subtlety to make a sophisticated strategy like this work.