From TED:

“Jackson Katz, Phd, is an anti-sexist activist and expert on violence, media and masculinities. An author, filmmaker, educator and social theorist, Katz has worked in gender violence prevention work with diverse groups of men and boys in sports culture and the military, and has pioneered work in critical media literacy.Katz is the creator and co-founder of the Mentors in Violence Prevention (MVP) program, which advocates the ‘bystander approach’ to sexual and domestic violence prevention. You’ve also seen him in the award winning documentary ‘MissRepresentation.'”