Often described as one of Shakespeare's 'problem plays', Measure for Measure explores issues of mercy and justice in corrupt Vienna. The Duke makes his strict moralistic deputy, Angelo, temporary leader of Vienna, while he disguises himself as a friar to witness all that ensues. In the comprehensive introduction to this new, fully-illustrated Arden edition, with commentary and notes from A. R. Braunmuller, Robert N. Watson explores the recent increased attention to the play and the shifting judgements of key characters such as the Duke and Isabella. He analyses the social foundations of these changes, their validity as readings of the text, and their manifestations in performance. It also explores the play's implications on topics including love, marriage, sexuality, consent, mortality, religion, statecraft, moderation, and theatre itself.