This two-disc compilation draws from popular and lesser-known catalogs of soul and incorporates sound-bites from revolutionaries like Huey Newton, Stokely Carmichael and Malcolm X, making it a comprehensive introduction to the sounds of the black power and arts movements of the 1960s and 70s. It’s a smart addition to novice soul collections, contextualizing the work of soul artists in reference to the socio-political upheaval of the time. Highlights include the informed historical narrative insert, and classic (and oft-sampled) tracks like Gil-Scott Heron’s “The Revolution Will Not Be Televised,” and Gene McDaniel’s “Compared to What.”