The article asserts a US "surrender" in the Iran nuclear deal signals a significant defeat, with profound global consequences. This failure, paralleled by Russia's struggles in Ukraine, highlights the decline of superpowers and the advent of a "post-American" era. China benefits as nations like Germany and Japan rearm, distrusting US security guarantees. The author warns of an unstable, chaotic, multipolar, or "G-Zero" world, predicting a global arms race and the irrelevance of the Non-Proliferation Treaty, leading to increased international instability.