ZJ....you've got some nice Star Trek ideas, unfortunately, in this world at this time (or any time prior to today), these ideas just won't fly.
For instance, take your idea of just removing our military from every spot they're currently stationed around the world. So what happens, for instance, the moment we leave South Korea? Think North Korea will just become a nice, soft, cuddly, safe neighbor to S. Korea, or would the reality be that N. Korea would immediately invade S. Korea?
Or take what's happening in the Ivory Coast. Without military force being used, Laurent Gbagbo would still be clinging to power, and still ignoring the valid election of Alassane Ouattara as president of that country.
Until the scum of the earth are no longer in power, the One World at Peace idea will remain just that.....an idea that will not come to fruition. It'll take some overwhelming global event to make the petty dictators forget their selfish power grabs and work with the more "enlightened" parts of the world.