CulSim is an agent-based computer simulation software that allows for further exploration of influential and recent models of emergence of cultural groups based on Axelrod (1997) by including parameters grounded in sociological theories. CulSim provides a collection of tools to analyze resilience of cultural diversity when single drastic events affects agents, institutions or global parameters of the simulation. Upon combination, these can be used to approximate historical circumstances. The software provides a graphical and text-based user interface, and so makes this agent modelling methodology accessible to a variety of users without programming experience from for example cultural studies or humanities