The innovative dramas of Henrik Ibsen created a sensation among 19th-century audiences with their mordant attacks on social conventions. Among the finest of these ground-breaking works was Ghosts, first performed in 1881. In it, the playwright assailed the hypocrisy of moral codes, offering a daring treatment of such then-taboo issues as infidelity, venereal disease, and illegitimacy. Ibsen substituted the modern scientific idea of heredity...