The coronavirus pandemic is slowing global commerce to a crawl, but many of the world’s largest economies are taking extraordinary actions to propel them through the crisis.

The United States and other Western countries are reevaluating their foreign investment regulations amid an uptick in Chinese interest in strategic sectors.

For many policymakers, economic sanctions have become the tool of choice to respond to major geopolitical challenges such as terrorism and conflict.

The U.S. Navy’s dominance of the world’s oceans has made it an indispensable foreign policy tool as well as a guarantor of global trade, but a mix of challenges is raising difficult questions about i…