I think the reason I love cinema so much is that, as a medium, it possesses the most potential for uniting the world. While we watch a DVD of a French film at home, sit in a theater being washed over by the images of an Italian B & W classic, or surreptitiously check out the recent download of a Bollywood movie on our iPad, we are undeniably transported to other lands, other eras and, most importantly, other ways of looking at things. But while the promise is there every time we choose a title, few films achieve the grand objective of forever changing our mind and enriching our world permanently.

Swedish filmmaker Göran Hugo Olsson’s documentary 'The Black Power Mixtape 1967-1975' is one of those once-in-a-lifetime films which seamlessly reaches the full cinematic goal of changing its viewers’ world for good.