Georg Simmel was a German sociologist and philosopher whose nonpositivist theory informed the critical theory of the Frankfurt School. Simmel wrote extensively on a myriad of topics ranging from the sociology of money to social individuality. His work illuminates the ways in which humans participate in society and how we come to define that society in the first place.
Simmel, Georg. “The Sociology of Conflict.” American Journal of Sociology 9.4 (1904): 490-525.
Simmel, Georg. “The Sociology of Secrecy and of Secret Societies.” American Journal of Sociology 11.4 (1906): 441-498.
Simmel, Georg. “How Is Society Possible?.” American Journal of Sociology 16.3 (1910): 372-391.