American and domestic foreign policy during World War 2 were linked in that once America entered the war it had a significant impact on its economy. ... It was Hitler who declared war on the USA. Prior to that American domestic politics were dominated by the arguments between interventionism and isolationism.
Commercialisation led to growth of national agriculture and agricultural problem acquired national form. It brought about regional specialization of crops on an efficient basis. Commercialisation encouraged the production of some specific crop and favourably affected their distribution.
