UN Secretary General Antonio Guterres attended the weekend’s G-7 summit in Hiroshima. At the meeting, he suggested the UN Security Council and the Bretton Woods global financial institutions need to be updated. He correctly noted that their design was based on the dominant countries right after World War II. Much has changed since then. Bangladesh has a population larger than Russia. China and India together will contribute over half the world’s economic growth in 2023. The G-7 was half the world’s GDP in 1980 but is just 30 percent of the total today.  Mr. Guterres was not specific about how he envisions the institutions changing, but his focus was inequality and so presumably it would involve the loss of power by G...