Facebook is so vast and tells such a complete story of us as social beings, that by analyzing it in smart ways, we can actually do things that were never possible before in human history, such as accurately predict where weshould work, who weshoulddate or how much money we will make during our lifetime.
Over the last two decades an incredible two billion people have gained access to clean drinking water for the first time, so it's not such a pipe dream to argue that weshould reach the remaining 783 million by this date.
Of course that should be done but to date there is no evidence that we will be able to generate enough energy from these sources to replace oil any time in the near future.