Huts they made then, and fire, and skins for clothing, And a woman yielded to one man in wedlock... ... Common, to see the offspring they had made; The human race began to mellow then. Because of fire their shivering forms no longer Could bear the cold beneath the covering sky.
LucretiusIt was certainly not by design that the particles fell into order, they did not work out what they were going to do, but because many of them by many chances struck one another in the course of infinite time and encountered every possible form and movement, that they found at last the disposition they have, and that is how the universe was created.
Lucretius