Este é um tropo bem comum. No entanto, aqui está um dos exemplos mais conhecidos:
De acordo com o O Restaurante no Fim do Universo , Terra foi povoada pela classe média inútil do planeta Golgafrincham, que foram enviados para cá na Arca B. A arca foi intencionalmente colidida com a Terra, mas o suficiente dos Golgafrinchans sobreviveram para se tornar a espécie dominante no planeta, aniquilando os nativos hominídeos.
The Golgafrinchans are a race of humanoid beings who realised that there were three types of beings on the planet of Golgafrincham. Thinkers, Workers, and the strange Middle Class.
The middle class comprised of hair dressers, lawyers, telephone sanitisers, and other such "worthless jobs".
The Thinkers built a ship and told the third class that the planet was to be consumed by a "giant space goat". So they built a ship and sent off their third class. Telling them that they would follow soon. The Third class ended up on Earth, "mucking up the program to determine the ultimate question", while the rest of the classes were killed off by a raging disease contracted from public telephones. Golgafrincham itself soon after was consumed by a giant space goat.