actually, if america had never been colonised, england would probably still be an empire, as the american civil war was what sparked the withdrawl/revolts in the other corners of the empire. since the majority of those inventions were invented by people who are descendants of colonists, and who probably would've either still been born in another part of english empire, or since most of these inventions are logical follow ons to someone elses work, or even just one induvidual finishing off someone else's project, human technology would still have advanced at the same pace. claiming that these inventions only exist because they were made in the usa is simply ridiculous verging on stupidity. however i agree with what a few people have said, about how the world would be politically and border wise if america didn't exist. the simple fact that europe, the uk and the africas could've become a much closer group of countries, if not one induvidual nation. out of pure neccesity of being so close together. and ok, if we entertain the thought that these people only invented what they did because of the fact they were in america. then lets consider what your responsible for negatively as well. NUCLEAR WEAPONS. i guess its easy for you to say oh look at all the amazing things that have happened on our soil. lets look over the fact that the american initiative to create nuclear weapons is the start of the single greatest world relations catastrophe ever. however, all of this aside, anybody trying to second guess how history would've played out if a certian continent, country, leader, or government had never existed is ridiculous and fruitless. you'll never find out, theres no way to test each theory, and all its going to do is start arguments about how important countries are to the development of the human race.