Why is America doing all the work while other countries fall asleep?

Why is America doing all the work while other countries fall asleep?? I mean from technology point of view. The Americans invest heavily on Science ,biology and so on...While some countries spend most of their time fighting other countries. Some don;t care improving the life of people on the earth at all. Why is that?? For example, people in my country. Taiwan and china, are mostly selfish people only care about money. They don;t interested in Science and saving the world that much.. The people around me seems to so satisfied with what they are...Most of them are too lazy to learn and do anything to improve their lifes. Why this kind of mediocrity still exsit on our earth?? From a evolution point of view, it is not better to kill them all?? I mean for the sake of the survival of the entire human race, we better without this kind of counties and people. Why are they still there??