McKay explores the music in relation to issues of whiteness, blackness, and masculinity—all against a backdrop of shifting imperial identities, postcolonialism, and the Cold War. He considers objections to the music’s spread by the “anti-jazzers” alongside the ambivalence felt by many leftist musicians about playing an “all-American” musical form. At the same time, McKay highlights the extraordinary cultural mixing that has defined British jazz since the 1950s, as musicians from Britain’s former colonies—particularly from the Caribbean and South Africa—have transformed the genre. Circular Breathing is enriched by McKay’s original interviews with activists, musicians, and fans and by fascinating images, including works by the renowned English jazz photographer Val Wilmer. It is an invaluable look at not only the history of jazz but also the Left and race relations in Great Britain.