| Summary/Abstract |
This article examines the relationship between US missile defense and the US-China security dilemma dynamics by developing the concept of diffuse signaling involving the Korean peninsula. We argue that the US’ efforts to bolster deterrence against North Korea’s growing threats through missile defense have resulted in China’s countermeasures of enhancing survivability and penetrability of its second-strike capability, leading to downward spirals of tensions between Beijing and Washington. We explain how three structural factors – geography, the US alliance system, and nuclear asymmetry – have made diffuse signaling salient, thus making it very challenging for the United States to reassure China even when its actions targeted North Korea. The article empirically shows the action-reaction process through which China and the US have come to experience the aggravation of the security dilemma over the Korean peninsula.
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