I can't see how it could happen - and the reason is even more depressing: world war 3. That will cause "the reset" and after few hundred years the civilization

I can't see how it could happen - and the reason is even more depressing: world war 3. That will cause "the reset" and after few hundred years the civilization will start growing again. Some of the current knowledge will be lost but it will be reinvented again but better.