Tomorrow Wars

Too often, the news cycle neglects the long-term existential threats to human civilization beyond climate change and environmental destruction. So I was pleased that Rachel Riederer [“Ad Astra,” Report, November] took seriously the threat of an international military conflict in space.

As Riederer writes, our global dependence on satellites is greater than ever. Tensions are rising between the United States, China, and Russia, and trust is in short supply. In a crisis, the time for reflection will be measured in seconds. The risk of war is terrifyingly real.

As Trump’s establishment of the U.S. Space…