This draft material gives an account of the "S-diagram", which uses Schelling's social choice diagram in the context of my NSNX ("neither selfish nor exploited") model of individual choice to provide an account of social equilibrium in situations in which social outcomes are contested. Examples...

The paper describes three novel regularities in public choice games, tied to a Darwinian argument about rules that could be expected to govern social choice. Note: This is a revised version of this paper, originally titled "Two Tests For ‘NSNX’ Effects In Cooperation Experiments," and...