美国为何不安全 美知名学者：华盛顿沉迷于单极世界幻想

Core Viewpoint - Renowned economist Jeffrey Sachs criticizes Washington's obsession with a unipolar world fantasy, ignoring the reality of multipolarity, which he claims is pushing the world towards the brink of nuclear war [1] Group 1 - Sachs argues that the insecurity of the United States stems from its continuous provocations towards other nations, particularly nuclear superpowers [1] - Regarding the upcoming meeting between U.S. President Trump and Russian President Putin in Alaska, Sachs suggests that a clear statement from the U.S. regarding "NATO not expanding" could significantly alter the global landscape [1]