Social status
Gould, Roger (2002). The Origin of Status Hierarchy. American Journal of Sociology, 107, Retrieved Oct. 26, 2007, from http://www.library.ohiou.edu:5334/ehost/pdf?vid=5&hid=108&sid=f177ce9d-24b5-4e01-819e-b243bd3768e1%40sessionmgr107