Tensions within NATO over the past two decades have led some to assert that the old military alliances of the 20th century are a thing of the past. Soon, the argument goes, they will give way to looser, ad hoc groupings like the Quadrilateral Security Dialogue, or Quad, comprising Australia, India, Japan and the United States; the AUKUS security pact among Australia, the United Kingdom and the United States; or other “coalitions of the willing” formed to address specific concerns, like those that intervened in Kosovo, Afghanistan, Iraq and Libya. To be sure, the past 30 years have punched some […]