Although his masterpiece, in my opinion, might be "Ashes & Embers," this brilliant, absorbing, harrowing, and no-holds-barred movie comes close. Haile Gerima makes films like Robert Kramer did: ones that explode and don't feel bashful about their emotion and political ideas. Sweaty, intense, and bold. Loved every minute of it. See Gerima's recent "Teza."
In this era of The Butler, everyone should seek out and see this film because it proves that artists were once well beyond where they are today. Not that this gritty street-theater ever came within a field holler of the Oscars or even national distribution (as far as I know). But it is the real thing, unvarnished, unflinching, and utterly transformative if you come to it with an open heart/mind.