Subtitled ‘Soul, politics and spirituality in jazz’, this excellent compilation from the greatly experienced archivist Dean Rudland presents an engaging overview of a thrilling school in black music in the wake of the civil rights movement and the emergence of the more militant post-King thinking. Indeed, the full title is If You're Not Part Of The Solution You're Part Of The Problem, a hugely significant slogan with regard to the urgent need for racial equality in America that inspired a superb piece by saxophone legend Joe Henderson, which has his trademark inventive blowing and all the super badness of a James Brown groove. If that is a clear sign of the infusion of funk into jazz in the era of Black Power then pieces such as Clifford Jordan's ‘John Coltrane’, a sublime lament for Ohnedaruth and Azar Lawrence's ‘Warriors Of Peace’ underline the ongoing extension of Trane's modal legacy. Gary Bartz makes an explicit tribute to the Motherland with the jangly rollicking cowbell beat of ‘Africans Unite’ while vocalese hero Eddie Jefferson reminds us how radical the early 1970s were musically with a daring reading of Miles Davis' ‘Bitches Brew’. Several of these tracks will be on the radar of seasoned collectors, but they are sequenced to provide an illuminating context for a key period in which musical dynamism and social activism were one.