All roads lead to the European Union. This, in a nutshell, is the argument of Roderick Beaton's book covering the history of the continent from ancient Greece to today's war in Ukraine. A professor emeritus of history at King's College London, Beaton wants his readers to consider the idea of Europe as it developed from around the battle of Marathon (490 B.C.) to the siege of Mariupol (2022 A.D.). And in a swift narrative he recounts this history, moving seamlessly from wars to peace treaties,