This is called judicial review.
Manifest destiny
America expansion in territories in Latin America was guided by the manifest destiny. The Americans believed that they had a divine duty to civilize and bring democracy as well as spread capitalism to the Latin world.
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Generally speaking, advanced farming techniques allowed for a surplus of food, which led to the emergence of a "artisan" class--since for the first time people were "freed" to engage in other actives besides gathering food.
You can say you agree the reason he bought Louisiana was for future protection and expansion and can make the Louisiana a great place for Economy
