• "Progress, whether scientific, economic, or social, is driven by innovation – which serves to produce a diversity of ideas – and imitation through a social network – which serves to diffuse these ideas. In this paper, we construct an agent-based computational model of this process, in which the agents in the population are heterogeneous in their abilities to innovate and imitate. The model incorporates the three primary forces: the discovery of new ideas by those with superior abilities to innovate, the observation and adoption of the ideas of others by those with superior abilities to communicate and imitate, and the endogenous development of social networks among heterogeneous agents. The objective is to explore the evolving architecture of social networks and the critical roles that the innovators and imitators play in the process."