From his penetrating examination of Oscar Wilde's path to self-destruction, to his tragic portrait of Joe Orton's corrosive relationship with Kenneth Halliwell; from his chronicle of the rise and fall and reprisal of the American musical to his insightful commentary on such playwrights as Tennessee Williams, Tony Kushner, Lillian Hellman, Arthur Miller and Tom Stoppard, John Lahr brilliantly illum