Historically most coups and revolutions are led by lower-upper sections of the population in question (colonels & young lawyers being the most stereotypical).

Historically most coups and revolutions are led by lower-upper sections of the population in question (colonels & young lawyers being the most stereotypical). They are the ones who have enough social capital to do something effective, haven't been quite co-opted or selected for obedience, and see their ambitions thwarted by the people directly above them.