The Guerrilla Girls are a group of anonymous artists who wear gorilla masks in public using facts, humor and outrageous visuals to expose discrimination and corruption in politics, pop culture, film and art. In 30 years, they have come up with hundreds of posters, street projects, actions, books, and billboards. Most recently they did a stealth campaign in New York about the super rich hijacking art, and a wall in Reykjavik about discrimination in the Icelandic film industry. Their retrospective in Madrid has drawn thousands of people. They travel the world doing gigs and workshops, inspiring others to create their own effective activist campaigns.