No-one would have believed in the last years of the 22nd Century that human affairs were being watched from the timeless worlds of space...
Aliens invaded the Earth and war ensued, lasting for several decades. However, the aliens were more powerful, more intelligent, and more deadly, and the only way humans could prevent extinction was to offer samples of humans to the aliens for pets to take back to their own planet. An agreement was reached and an alien, weirdly dressed in human clothes, shook hands with the instigator.