With the fall the of the Soviet Union, the US became the sole superpower and without a rival to compete and challenge the US started to reduce its military investments... until Sept 11 2001.
NATO was losing relevance, Trump was trying to extricate the US from its commitments to NATO, and so were other members of NATO... until Feb 24, 2022.
[Video: Can the US continue to be the Police of the World - Visual Politics EN]
