The second best thing about space travel is that the distances involved make war very difficult, usually impractical, and almost always unnecessary. This is probably a loss for most people, since war is our race's most popular diversion, one which gives purpose and color to dull and stupid lives. But it is a great boon to the intelligent man who fights only when he must-never for sport.
Robert A. HeinleinHate always sells well, but for repeat trade and the long pull happiness is sounder merchandise.
Robert A. HeinleinAll human behavior, all human motivations, all manโs hopes and fears, were heavily colored and largely controlled by mankindโs tragic and oddly beautiful pattern of reproduction.
Robert A. Heinlein