Cargo Cult

According to Jack Harkness, Cargo Cults existed in the South Seas.

They were primitive tribes who lived in isolation until they saw aircraft flying over their islands. They built up a religion based around these aircraft which pereverted their own cultures into "something unnatural". One sch tribe ended up worshipping the Duke of Edinburgh.

Jack saw this as a reason for making sure artefacts remained in the Torchwood archives. He believed they had a responsibility to stop Earth's culture from becoming contaminated. (PROSE: The Beauty of Our Weapons)