Small wonder, then, that homo sapiens spent most of their short time on Earth waging war against each other.
For their first few thousand years on the planet they did little else, and they discovered two things that were rather curious: the first was that when they were at war, they agreed more. Whole nations agreed that other nations were insane, and they agreed that the mutually beneficial solution was to band together to eliminate the loonies. For many people, it was the most agreeable period of their lives, because, apart from a brief period on New Year’s Eve (which, incidentally, no one could agree the date of), the only time human beings lived happily side by side was when they were trying to kill each other.
—Grant Naylor (aka Rob Grant & Doug Naylor)
—found in Better Than Life (1990)