The best: The ability of the U.S. throughout its history to take people of many different cultures and adding them to our own. In almost every other country, with few exceptions, this is considered a weakness; with us, it is a source of strength. This isn't to say that there haven't been difficulties with each new culture that is added, some friction - we always seem to overcome the problems and move on. It is worth noting here that the majority of people in the U.S. (including myself) are ancestors of people that other countries didn't want. The worst: (There isn't even a close second place) Fast food. It has added an average of 10 kilos of fat to every man, woman and child in the U.S. and it is painfully successful in doing this to the people in other countries.

The best: people hardly try to achieve their goals. The worst: The American governments and awful democracy exist in the USA. they done more than ten wars in all over the world at 21 century.they support vampire dictators.they used atomic bomb. and etc