Beth Steel's The House of Shades unites national politics and private lives through the fortunes of a working-class family from 1965 to 2019 Old myths die hard. One of the greatest in theatre is that the large-scale play that unites public issues and private lives is the special province of male dramatists. Watching Beth Steel's The House of Shades at the Almeida, I was reminded that this is a ludicrous fallacy: seei…