What strategic dynamic complicates modern US-Russia nuclear arms control, often requiring a third power’s inclusion?

💡 Explanation:

Contemporary nuclear arms control efforts between the United States and Russia face complexity due to the rise of China as a major nuclear power. China's growing, unregulated arsenal is seen by some analysts as destabilizing, pushing for a trilateral framework rather than the traditional bilateral one to maintain strategic stability. This shift fundamentally alters the strategic calculus of arms limitation.