India-Pakistan relations are best understood as an example of nuclear rivalry, in which nuclear weapons both exacerbate and limit hostility. In all such relationships, the minimal possession of nuclear weapons suffices to deter. Both India and Pakistan have adopted a minimalist posture, yet their strategic thinking tends to be inconsistent, which makes them vulnerable to needless expansion. This essay points to the conceptual basis for an optimal doctrine. It concludes that, while the military equation between India and Pakistan is stable, India has begun to widen the political gap between them.