Everything is linked
As Bill Hicks once said the US annual defence budget is vast. If instead of spending that money on weapons the US gave clean drinking water to the entire planet imagine how the US would be perceived by the world
If the US stopped giving money and weaponry to Israel (5 and half billion $ a year see:
http://www.ifamericansknew.org/stats/cost_of_israel.html ) and instead used the money to help Palestinians rebuild and integrate with Israelis and helped Palestinian refugees in Jordan and other places, the US could bring peace to the middle east.
If the US could stop crushing the spread of socialism and embrace it, it would bring the world together in peace.
If the US used its wealth to stop using fossil fuels it could help the environment and lessen global conflict
etc etc etc
The problem is that the US is a tottering unstable structure. It is made up of a pillar of arms dealing, a pillar of narco dollars, a pillar of petro dollars, with a roof of propaganda and lies all built onto a shifting foundation of debt through mindless consumption
It is a giant ponzi scheme which is driven to desperate acts to perpetuate the bubble