Why is North America so developed?

North America has the blessing of both massive tracts of tillable land and the energy and natural resources to be relatively independent. These factors allow the continent to export the excess production to the rest of the world. There has not been a major war fought on the continent since 1865

answer; the president uses mass media to gain support for policies;

stable food supply,social structure, government,religion,culture/art,technology and writing/language;