Judith Butler is a theorist of power, gender, sexuality and identity who is a professor at UC Berkeley. In her influential book Gender Trouble, she argued that feminism reinforced a binary view of gender that limited choices. She suggested gender should be seen as fluid and changing based on context, rather than fixed, and that it is performed rather than expressing an inner essence. This perspective has implications for how gender is represented in media, which can disseminate alternative images and influence norms through symbols.