I don't believe that there will ever be peace in the world.
Sorry, I'm a realist, albeit an optimistic one. You see, humans are just too territorial, identify too much with their beliefs, and are too greedy. At any time, somewhere on our planet, there will be a war.
However, this doesn't mean significant change is impossible. You see, there are a small number of countries that can make changes that will affect the entire world. Most significantly of course, America.
Love them or loathe them , we all admit they have the most power. And with that comes control in two ways. Firstly, instill fear into the people. If they fear, they will come to accept the Top Man's cry for war. Secondly, have the financial stature to push other countries around - no need to convince them, they'll follow because you hold the purse.
The informed and intelligent of us know that American 'peace keeping' and wars are economically motivated and sustained. The ordinary citizen sees through the media what the Powers That Be want them to see - but They make you believe you live in Freedom.
I live in a country right now that endured a sanction. A country that had nothing to do with the conflicts. While the trouble-makers were a small rebel group, the rest of the world believed it was the entire government and the ordinary citizen who were behind 'atrocities'.
A country where the ordinary people had to line up for bread and oil, and those things were only available on certain days. Where there were no jobs, little hope, and nights were passed watching cross-fire in the distance. For what? For some Big Shots to line their pockets in a faraway land. War is big bucks, to the Big Shots.
So does a new president herald a time of peace? Many Americans seem to think so. I of course am too cynical (and to Aussie/British) to believe a politician. But I do know that he has the burden of living up to a certain ideal more than other presidents before him. If he doesn't deliver, it will be a historical time, but not as he probably hopes.
We will probably never see an end to all those little wars between small countries. But the big wars, the ones where billions of tax dollars/pounds are spent, instead of going towards health and education, the ones where countless lives are lost for nothing but a Big Shot's financial gain - those wars have a chance of disappearing.
I hope so, for every young person's sake. I hope the world has a chance.
[edit: click picture for more peace posts from others]