tl;dr
decrease your aggressive defense budgets - US spends to much time figuring how to kill people than it does saving them.
for such a melting pot of cultures your belief in mono-God does my head in, man was around before God, although this is realistically a different subject entirely.
US consumption is at an all time high, your packaging and processing methods need some serious cut backs, as well as your dietary values which account for so much waste.
pollution is a necessity in our industrial age, but you have the money and the power to make serious changes that have an effect on the rest of the world, if not environmental, just through the psychology perspective.
Get us off this fucking rock, the world looks to america for space exploration, at the moment you're spending not enough time (imo) getting us out there. Of course there are technological set backs to consider, but the point is clear.