The physical causes, independent of the laws, which contribute to promote general prosperity, are more numerous in America than they have ever been in any other country in the world, at any other period of history.
Nolanahi ere, ongizatea sor lezaketen kausa materialak eta legeekiko independenteak ugariagoak dira Amerikan, munduko beste edozein herrialdetan historiako edozein garaitan izan direnak baino.