https://econ.st/2Zj8pal Just occasionally, you can see the tectonic plates of geopolitics shifting in front of your eyes. Suez in 1956, Nixon going to China in 1972 and the fall of the Berlin wall in 1989 are among the examples in living memory. The unveiling last week of a trilateral defence pact between Australia, the United Kingdom and the United States (introducing the awkward acronym of aukus) is providing another of those rare occasions. ... The powerful reverberations of aukus show what a profound shift it represents. For America it is the most dramatic move yet in its determination to counter what it sees as the growing threat from China, particularly the maritime challenge it poses in the Pacific. Not only is America sharing the crown jewels of military technology, the propulsion plant for nuclear submarines, with an ally for only the second time in 63 years (the other time being with Britain). It is also robustly signalling its long-term commitment to what it calls a “free and open Indo-Pacific”.