A Midsummer Night's Dream touches upon several themes including time, identity, gender, sexuality, fantasy, magic, and madness. Specifically, these themes help explore the changing roles in society.
Think about the relationships of Theseus and Hippolyta; Demetrius and Helena; Lysander and Hermia; Bottom and Titania; and Oberon and Titania.
How do these characters bring about change to their society? Think about what Shakespeare is saying about gender roles in the play.