Bill Gates

Governments will always play a huge part in solving big problems. They set public policy and are uniquely able to provide the resources to make sure solutions reach everyone who needs them. They also fund basic research, which is a crucial component of the innovation that improves life for everyone.

Obama might as well be president of Turkey or Brazil; it does not matter. It's the system that is absolutely flawed, where 25 or 35 or 50 people make multi, multi-billions on building Olympic structures while people live in Barbados and have no roads or clean drinking water. There's something pretty inequitable there.