What makes America so powerful? Part ONE!!!!?

In my opinion, the reason why America is so successful is mainly because our population is so diverse and our society is so open. The openness fosters almost unlimited creativity and the diversity permits us to look at problems from different angles thanks to cultural differences. We are also exposed to all these different views and the minds of those receptive to news ideas are expanded in ways which are impossible in closed societies. Because our people come from every country and every culture in the world we bring forth a common denominator which enables us to produce things that appeal to people all over the world. America has a little bit of everybody in her. Also the people who came here had to have the courage to leave everything they knew and held dear behind, we are a bold breed who have survived against the odds. This gives the Americans a can do attitude. I am a naturalized US citizen born and raised in Europe. The American can do attitude is really striking to me, I notice it almost constantly by contrast when I discuss problems with my European relatives. They are always telling me how this is impossible, or that is pointless or it is no use trying to change things, etc... I have discussed this with some other American people who are also intimately acquainted with Europeans and they to are too struck by the no can do attitude. I have on a couple of occasions helped my relatives with issues and taken the "impossibe" route. Every step of the way they were telling me how this wasn't going to work, or that person could not do such and such. I did it anyway and the problem was solved. I had to shake my relatives a little and push them to do one thing or the other. They probably think that I have become a little pushy and brusk but I am just used to getting things done anymore. When their poblem is solved, they are glad for it but they still hum and mumble about things. I believe that this is partly why people see Americans as pushy or bullies. We in general don't just sit around making mental lists of all the obstacles then mull about them.