The rate of profit... is naturally low in rich and high in poor countries, and it is always highest in the countries which are going fastest to ruin.
Adam SmithMan is an animal that makes bargains: no other animal does this - no dog exchanges bones with another.
Adam SmithGood roads, canals, and navigable rivers, by diminishing the expence of carriage, put the remote parts of the country more nearly upon a level with with those of the neighbourhood of the town. They are upon that the greatest of all improvements.
Adam Smith