Here is a beautiful graph that breaks down the planet into demographic groups. If the world were 100 people it would look something like this:

 

Wow! What an idea. It sure looks beautiful, but I think we would probably very lonely. I see so many people every day where I live. There is just about nowhere to go, where you will find no other people. I don't know how sustainable this will be and if there are enough people to actually manage the world.

This is a great prospective to look at things. It almost easier to visualize things with only 100 people. It interesting to see who has what or does what. Though I was think it would a cool experiment to do and how things would pan out.