This is of course somewhat of a subjective question, but in general many would believe that the United States should be praised for the military strategy of "Europe First".
The answer should either be Sanction or Embargo.
The Columbian Exchange had positive and negative consequences.
Some of the positive consequences were the introduction of different nutrients and food supplies into the Old World, such as corn or potatoes. This improved the diet of most Europeans, leading to a population growth in the next generations.
However, Europe benefited more than the Americas, for some of the negative consequences about the Columbian Exchange were the introduction of diseases into the continent and the slavery of African populations into the Americas.
A free summary of Freak the Mighty by Rodman Philbrick. A fun and ... Not so fast. Killer Kane ends up being paroled, and he kidnaps Max on Christmas Eve.
Iran tried getting their own freedom from mohammad mossadegh, so they went to the US for help