Contents:Introduction / Toshi Yoshihara and James R. Holmes -- After proliferation: deterrence theory and emerging nuclear powers / Joshua Rovner -- South Africa's nuclear strategy: deterring "total onslaught" and "nuclear blackmail" in three stages / Helen E. Purkitt and Stephen F. Burgess -- The future of Chinese nuclear strategy / Christopher T. Yeaw, Andrew S. Erickson, and Michael S. Chase -- North Korea's nuclear weapons program: motivations, strategy, and doctrine / Terence Roehrig -- Changing perceptions of extended deterrence in Japan / James L. Schoff -- Thinking about the unthinkable: Tokyo's nuclear option / James R. Holmes and Toshi Yoshihara -- India's nuclear strategy / Anupam Srivastava and Seema Gahlaut -- The future of India's undersea nuclear deterrent / Andrew C. Winner -- Pakistan's nuclear posture: thinking about the unthinkable? / Timothy D. Hoyt -- Regime type, nuclear reversals, and nuclear strategy: the ambiguous case of Iran / Scott A. Jones and James R. Holmes -- Conclusion: thinking about strategy in the second nuclear age / Toshi Yoshihara and James R. Holmes.