Guerrilla Girls is an art collective. They are anonymous artists from New York who, since 1985, have been humorously and efficiently exposing the discrimination suffered by women in the art world. The artists intervene in New York streets and art galleries anonymously, using gorilla masks under the names of deceased artists (like Kathe Kollwitz). They understand that the issues reported are more important than individual authorship. Its feminist agenda also reveals criticism over colonialism and racism. They alert how, throughout art history, women have been vastly seen as nude models but ignored as artists. The Guerrilla girls focus on the world of art, film industry, popular culture, gender stereotypes, and the corruption that invade the art system. Their posters use graphics and humor as high impact tools to communicate their messages. The current members of the group bring out campaigns against women violence, fight for racial discrimination, and oppose wars and dictatorships.