To what extent have political (race, gender, social class) attitudes been implicated as human factors in the cockpit?
There are numerous accident reports that state cultural issues as contributing factors, especially respect for elders / superiours / social class in Asian countries leading to poor "Crew Resource Management" - typically the co-pilot failing to challenge the captain. 

The first examples that come to mind are:


https://en.wikipedia.org/wiki/Korean_Air_Cargo_Flight_8509 - According to the Mayday episode, the captain was of a higher social class than the co-pilot.
https://en.wikipedia.org/wiki/Korean_Air_Flight_801
https://en.wikipedia.org/wiki/Air_China_Flight_129