Ai Weiwei’s Heartbreaking, Mesmerizing Documentary Human Flow

Human migration is natural;  borders and checkpoints and barbed wire are not. War causes mass suffering, but the indifference of the comfortable exacerbates it unimaginably. Tolerance and compassion are in short supply when they are needed more than ever. These ideas are central to Human Flow, the artist Ai Weiwei’s heartbreaking but mesmerizing documentary on the worst refugee crisis (the United Nations estimates there are currently 65 million people displaced globally) since World War II.