Maybe "as we know it", and countries do come and go. But this won't be the end of us just yet. It will actually make us that much stronger in the next cyclical economic upswing (as opposed to sending businesses overseas completely or out of business altogether).
You don't know this. Another outcome is that the entry via globalization of third-world workers will depress living standards in first world. Nobody knows the outcome of technology-driven globalization because it's new.