Since 1660 when actresses first began performing on the English stage, women have forged bright careers in theatre, while men called the shots. Four hundred years of women playwrights, from Aphra Behn to Caryl Churchill, yet plays by women make up less than a quarter of staged productions in the UK, leading to a scarcity of roles for women. With women buying most of the tickets, theatre productions risk losing their relevance to modern culture if...