The Revolution Got High And Died
Another major factor is the widespread addiction to Khat (a mildly narcotic leaf that is addictive and has to be chewed fresh), that leaves about half the adult male population dazed and idle in the afternoon and evening. Foreign reporters have noted how crowds of demonstrators tend to thin out in the afternoon.
Who would have thought that widespread drug use would result in the masses being unfocused and apathetic about an objectionable government?
Oh yeah, ME! I Pointed out the phenomenon in theory quite a while ago. Not a conclusive test of the theory, but an indicative one.