Diane Arbus: Sanctum Sanctorum review – a grotesquely bleak but brutally truthful vision of humanity

David Zwirner Gallery, London
From cruel pictures of elderly widows to a shocking image of motherhood, the American photographer’s genius is on full display in a show that finds ugliness all around herIn 1971, at the age of 48, the American photographer Diane Arbus killed herself. Someone should have seen the clues, for her photography is not so much tragic as utterly alienated from the human species. Here is a woman nursing her baby, a modern Madonna – except the woman’s limbs