AmericanfilmcriticElvisMitchell’skaleidoscopicdocumentarycreatesadefinitivenarrativeoftheBlackrevolutionin1970scinema, fromgenrefilmstosocialrealism—aworkofpainstakingscholarshipthat’salsothoroughlyentertaining, anessentialarchivaldocumentandtestamenttoaperiodofAmericanfilmhistoryunlikelytoberepeate...