A 2D canvas companion to the 3D Ultimatum Game: the same evolutionary model — a population of agents repeatedly playing the ultimatum game with evolving offer and minimum-acceptable-offer strategies — rendered as flat colored discs and a live histogram instead of a WebGL scene.
Classical game theory predicts a rational proposer should offer close to nothing. Here, agents that offer too little get rejected and lose payoff, so generosity is imitated more often over generations — the offer distribution drifts toward a fair 40-50% split.
Adjust Population and Mutation rate, toggle the game-theoretic baseline marker, and Pause/Reset to restart the population from scratch.