As every individual, therefore, endeavours as much as he can both to employ his in the support of domestic industry, and so to direct that industry that its produce may be of the value; individual necessarily labours render the annual revenue society as great as he neither to promote indeed, interest, knows how much he is promoting it. By preferring the support of domestic to that of foreign industry, he intends only his own and by directing that industry in such a manner as its produce may be of greatest h 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. Nor is it always the worse for the society that it was no part of it. By pursuing his own interest he frequently promotes that of the society more effectually than when he really intends to promote it.