From "Hitchhiker's Guide to the Galaxy":

Golgafrincham, home of the Great Circling Poets of Arium, decided it was time to rid itself of an entire useless third of its population, and so concocted a story that their planet would shortly be destroyed in some great catastrophe. The useless population (consisting of hairdressers, tired TV producers, insurance salesmen, personnel officers, security guards, management consultants, telephone sanitizers and the like) were packed into the B-Ark, one of three giant Ark spaceships, and told that everyone else would follow shortly in the other two. The other two thirds of the population, of course, did not follow and "led full, rich and happy lives until they were all suddenly wiped out by a virulent disease contracted from a dirty telephone".

The B-Ark was programmed to crash-land on the first planet it came across, which happened to be Earth, and the Golgafrinchans gradually usurped the native cavemen, becoming the ancestors of humanity and thereby ruining the great experiment to find the question for the Answer to Life, the Universe, and Everything.

The purpose of this tribe is to examine candidates for our own B Ark. Who would you suggest?

http://the-b-ark.tribe.net