It is the maxim of every prudent master of a family never to attempt to make at home what it will cost him more to makethantobuy.Thetaylordoesnot attempttomakehis ownshoe†All ofthemfind itfor their interestto employ their whole industry in a way in which they have some advantage over their neighbours and to purchase with a part of its produce†whatever else they have occasion for† What is prudence in the conduct of every private family, can scarce be folly in that of a great kingdom† Would it be a reasonable law to prohibit the importation of all foreign wines, merely to encourage the making of claret and burgundy in Scotland?

-Smith, Adam
  An Inquiry into the Nature and Causes of theWealth of Nations, bk.4, ch.2.