To all things an end, to every night its dawn; even to the longest night when dawn never comes, there comes at last the dawn. - Alistair MacLean's Death Train

Nature wanted to show mankind, an irreverent, over-venturesome mankind, just how puny and pitifully helpless a thing mankind really is

The Major Smiths of this world don't drive over the edge of a cliff. Quotation from the future Mrs. Schaffer. The Major Smiths of this world don't fall off the roofs of cable cars. Quotation from the future. Mrs. Schaffer's future husband.

They have every good reason to fear those from the outside world. We, ironically known as the civilizados—in practically everything that matters they're a damned sight more civilised than we are—bring them so-called progress, which harms them, so-called change, which harms them, so-called civilisation, which harms them even more, and disease, which kills them.