What will happen when the internet shuts down?

Have you ever wonder what will happen in the world when the internet shuts down? No more browsing, no more chatting no more social networking. But wait, these are just simple things. How about the banking industry? how about he business that runs on the internet? how about the communication industries? All this businesses will shut down as well.

Does it mean it is the end of the business era? and we need to go back to stone age?

When internet comes to its end is it also the end of the world?