The goal of this project is to model and study large populations of humans by simulating small-scale social interactions that take into account social influence dynamics, human behaviors, cognitive science, artificial intelligence, and social science. We aim to support a variety of applications, such as examining the implications of social science theories and developing playable, explorable story worlds. We support novice and experienced researchers and game designers with the design of a multi-agent simulation frameworks, authoring tools, and engines capable of complex simulation of societies of social, digital humans.