The vast majority of its inhabitants are progressives who advocate for a much more egalitarian society, country, world. And yet, if would be difficult for those same people to organize themselves in any more hierarchical manner.
Allowing for small variations at different institutions, behold the standard hierarchy:
Upper administration—President, Vice-Presidents, Provost
Tenured professor with endowed chair
Tenured professor
Tenured associate professor with endowed chair
Tenured associate professor
Assistant professor—tenure track
2 year visiting assistant professor—non-tenure track
1 year visiting assistant professor—non-tenure track
Contingent faculty—Adjunct professor, lecturer, clinical professor—typically hired on a semester-by-semester, course-by-course basis (often no benefits)
Staff
Plant services
Custodians/housekeeping