When most of us think about the potential of outer space for future generations, we think of world communications, satellite navigation, and scientific exploration. U.S. Space Command, however, thinks about weapons. Believing that conflict in space and wars fought from space are inevitable, the president has called on the agency to weaponize outer space and thus provoke an arms race that could cost the United States trillions of dollars and could lead to the demise of the human race.

In War in Heaven, a Nobel Prize nominated peace activist and a former U.S. foreign service...