Wiktionary
neotribalism
n. ideology that humans have evolved to live in a tribal, as opposed to a modern society.
Wikipedia
Neotribalism
This article concerns the sociological concept of neotribalism and not the reemergence of ethnic identities that followed the end of the Cold War.
Neotribalism (AKA Neo-Tribalism and modern tribalism) is a sociological concept which postulates that human beings have evolved to live in tribal society, as opposed to mass society, and thus will naturally form social networks constituting new " tribes".