For the past twenty-five years, many artists, political activitists, and students of media, literature and other cultural forms have radically challenged and changed the ways they think about language, images, and the creation of meanings within and across cultures. Concerned with how forms of cultural expression such as art, film, television, and writing both re-present and produce social relations and social inequalities, they have made "representation" a key issue in their actions and debates. They have used the term "representation" to refer to the processes that people and social groups use to interpret and give meaning to the world, and to the mediation of those meanings by and through language, stories, images, music, and other cultural products.