Photo by Thierry Monasse/Getty Images Europe is not a museum. It is blurring with Africa and Asia, and not only demographically. Europe has never, as our maps imagine, truly been a place apart from other continents. The common destiny that Europeans share has been shaped over the past decade by events outside its borders and outside its control: from the Syrian War that sent millions north-westwards, to the tangled crisis of development, climate and expectations affecting Africa which has seen millions more start to move towards the same destination. This is as epochal a change as any in our history,...