“Of all the productions of land, milk is perhaps the most perishable. In the warm season, when it is most abundant, it will scarce keep four-and-twenty hours. The farmer, by making it into fresh butter, stores a small part of it for a week: by making it into salt butter, for a year: and by making it into cheese, he stores a much greater part of it for several years.” – Adam Smith, An Inquiry into the Nature and Causes of the Wealth of Nations, Vol. One