The authors present a new game-theoretic interpretation of Hobbes's state of nature that, unlike existing rational-choice models, questions the possibility of individually rational decision making. They provide a general formulation of the two-player two-strategy game applied to the state of nature and derive existing models as special cases. A nonstandard version of Chicken under incomplete information, that interprets “death” as infinitely bad, provides an explanation for important and hitherto unaccounted for claims by Hobbes. The authors suggest that rational choice in Hobbesian political philosophy ought to examine not so much the mechanics of rational action in natural conditions, but rather the means whereby citizens already living in civil associations can be persuaded of the irrationality of civil war.