i dont believe that because even classless societies progress. many become classed but there are other routes of progression.

and i dont think its wrong at all. a government may be made up of classes but it only takes one reshuffle/coup/dictator to eradicate the class system. and would capitalists create tribalism? they have. the ancient greek city states were in effect capitalist tribes. the capitalist heirarchy is perfectly evident in what were tribes.