Can we rebuild it? Can we make it stronger?
Someone asked me for ideas on how to use technology to make the world better. Whoa. Changing the world is a lot easier than making it a better place. It takes historians decades to begin to decipher the lasting effects of historical forces. Lenin cared greatly about his fellow man, and the fruits of his intellect were poison. A vicious brute can cause a long term swing in the opposite direction when the world is disgusted by his ego and cruelty.
Trying to guess what will "make the world a better place" is probably a lot like flipping a coin. However my best suggestion would be helping to educate intelligent poor children anywhere in the world. Technology can help with this. A cheap used computer with a monitor and an Internet connection costs about $250 plus $100 a year. It is an encyclopedia of great power and allows a bright young person to learn anything. Check out the link below - it is MIT's OLPC (one laptop per child) media lab initiative. I believe it is the most important thing we can do to improve the world.
If you were hoping to create an idea yourself, I would ask you this: why? Smarter and more caring people than us have started thouands of great projects. It is a truer and better thing to help them than to waste time reinventing a poorer wheel. Helping severly impoverished people live longer without helping them educate their children is meaningless. Teach a person to read...