Cornering Communism and causing the USSR's collapse, The Berlin Airlift, maintaining the Monroe Doctrine in the Americas, inventing the Internet and cell phones, laying the Transatlantic telegraph cable, inventing the airplane, the first nuclear reactor (which my great-grandfather helped to build, BTW, so i should know), killing Osama bin Laden, supporting developing countries, I could go on but I think you get the point.
And if you aren't from the US (I would ask then why you are still here if we are so awful) what country ARE you from?