Inventions.

In my opinion, the best invention in the  last 100 years is the Internet. With it, the world have been globalizated. All the world can comunicate with people around the world, the place doesn't matter. With Internet all is possible.
And, on the other side, the most important invention of the next 100 years will be the flying-cars. The people can go to the places faster and you will feel amizing going on the sky. I would love it!