Wherever there are people – in buildings, in neighborhoods, in city centers, in recreational areas, and so on – it is generally true that people and human activities attract other people. People are attracted to other people. They gather with and move about with others and seek to place themselves near others. New activities begin in the vicinity

Its scholars study many different kinds of cultural groups—from hunter-gatherer clans to corporations to nations—investigating cognitive structures, social structures, biases, and behaviors.