The first warning signs of war with Russia came in January 2022. The threat of invasion began to dominate the news cycle, and my team and I started daily monitoring of the growing number of Russian troops at the border. My girlfriend and I were visiting her family in southern Ukraine for the holidays and already thinking about emergency scenarios: ensuring that our car always had a full tank of gas, making plans for the worst.

A version of this article appeared in the July–August 2023 issue of Harvard Business Review.