“Every individual necessarily labours to render the annual revenue of the society as great as he can. He generally, indeed, neither intends to promote the Public Interest, nor knows how much he is promoting it… He intends only his own gain and he is in this, as in many other cases, led by an invisible hand to promote an end, which was no part of his intention. By pursuing his own interest, he frequently promotes that of the society more effectually then when he really intends to promote it” (Smith 1776).