Europe is as much an idea as it is a place. We straddle a supercontinent physically dominated by Asia and Africa, but remain separate from them. Malta is not African, nor Athens Turkish. Against some patriots’ qualms, the United Kingdom is a subdivision of European culture, maritime and political divisions notwithstanding. Throughout the Middle Ages, in fact, the English Channel was rarely the “moat defensive to a house” lauded by Shakespeare’s John of Gaunt, but more what its namesake suggests—a vital modicum of communication and transport.