What would happen if America left Europe to fend for itself?

Jonathan Eyal of the Royal United Services Institute in London imagines a frenzy of activity, a cacophony of summits—and a renationalisation of defence strategies. Lots of countries would seek bilateral deals. In central Europe he would expect an alliance between Poland and Romania to guarantee the eastern border. The Russians and Chinese would not sit idly by, he says, but would play their own games with the Greeks, Hungarians and others.