We often talk about large-scale outcomes, such as sustainable cities, inclusive cultural institutions, accessible media, and more. These outcomes emerge from many repeated interactions among individuals. Such iterated behaviors are often subtle, rarely linear, and never inevitable. At Knology, we study the behaviors, mechanisms, and processes that generate widespread social outcomes. When we think of behaviors, we ask: Who are the people interacting, including their characteristics as persons, their relationships and obligations to each other, and their histories? How do people's choices enable or preclude future choices, shape their values, and reinforce or interrupt behaviors? At what point during repeated interactions do individuals recognize themselves as a community, with shared goals and practices, to which they are willing to hold one another accountable?