Will 2022 turn out be a hinge year, as a moment when long-standing trends in geopolitics suddenly shifted in a different direction? This week, two important writers, one a long-established and prolific historian, the other a provocative presence on the internet, have argued persuasively that the answer is yes. But there's one other interesting point in common: Neither sees the United States as having played a decisive role in the sudden shift. Over the years, Niall Ferguson has written admiringly about the 19th-century Rothschilds and the 20th century’s Henry Kissinger and has highlighted the positive achievements of Britain’s empire and...