Who told people to stay out of our hemisphere

Jackson pollock described his art style in the following quote: “new needs need new techniques.… it seems to me that the modern painter cannot express this age, the airplane, the atom bomb, the radio, in the old forms of the renaissance or of any other past culture. each age finds its own technique.” what point is pollock making about the new styles of art?

What evidence is there in this document that the policy was a good idea?

American interventions in nicaragua and mexico were based on what is the answer