There are artistically masterful documentaries that demand our attention, and there are socially important documentaries that deserve it—but rare is the film that falls so absolutely into both categories. Beyond powerful, THE DEVIL CAME ON HORSEBACK looks at the ongoing atrocities in Darfur through the eyes of a former U.S. Marine assigned to monitor the region and moved to action by the international community’s failure to respond. A film you won’t want to miss, and probably shouldn’t.