[Hume]

The decline of the empire and being whittled down to 'just our island' has coincided with the best possible time to be alive in britain, very far from being a disaster.

As for having the wrong culture for the modern world; the UK for all its flaws, is an open and creative society and has been so for many generations, more than the vast majority of societies worldwide. There's no good reason to believe that the brits won't keep on taking in and improving on the best ideas form around the world.