Towards the end of Leopoldstadt, a young writer named Leonard is handed a sheet of paper with his family tree on it. The chart spans four generations and bears the imprint of two dozen lives that have been cut short by tragic endings: illness, suicide, Auschwitz. This dense network of a Viennese family's tarnished past […] The full version of the article Tom Stoppard's "Leopoldstadt" at Wyndham's Theatre is availab…