Marx and Engels meet cute in this intense, fervent film about the early development of communism from I Am Not Your Negro director Raoul Peck. It’s a sinewy and intensely focused, uncompromisingly cerebral period drama, co-written with Pascal Bonitzer, about the birth of communism in the mid-19th century. It gives you a real sense of what radical politics was about: talk. There is talk, talk and more talk. It should be dull, but it isn’t. Somehow the spectacle of fiercely angry people talking about ideas becomes absorbing and even gripping.