For a man who considers himself the greatest builder the world has ever known — move over, Pharaoh Khufu! — Donald Trump has managed vanishingly little of it in either of his presidential terms. What his administrations have done is show an impressive talent for tearing things down. From the East Wing of the White House to the United States Agency for International Development (USAID) and public health, Trump has demonstrated a clear aptitude for demolition. Among his most successful accomplishments has been his assault on the international institutions that were created in response to the worst catastrophes of the 20th...