I wonder what the world would be like today if there never was an ancient megaflood to scoop out the English Channel, and Britain was still attached to France
@BlueGreenGrey Well, it would be different, for sure. Both better and worse.
It is possible to see a series of developments that meant neither France nor Britain would exist as nations - Scotland and northern England might well be Scandinavian. There might be a whole series of Belgiums stretching from the Pyrenees to the English midlands, not one of these states ever developing enough economic muscle to start to seriously dominate its neighbours.
Britain would not have ruled the waves and so the Spanish overseas empire may have flourished for much longer. India might still be an agglomeration of princely statelets.
It is unlikely that the North American continent would exist as it does today.
Interesting question - just too late and too tired to do it justice.