I can't think of anything more depressing than bringing war to outer space. The international space station was supposed to be a way the U.S. and Russia, and o

I can't think of anything more depressing than bringing war to outer space. The international space station was supposed to be a way the U.S. and Russia, and other countries, could grow closer through cooperation and a shared spirit of adventure and discovery. If we are ever to have, say, fusion-powered spaceships to colonize the solar system, we'll have to leave war behind. A fusion-powered spaceship is just a very controllable hydrogen bomb. If we ever want to have hundreds or thousands of them traveling around in the solar system, we'll have to figure out some way to absolutely prohibit them from being used as weapons. The kinds of energies needed to travel between planets is more than enough energy to destroy anything faster than we can create it.