Watch the video. I'm embarrassed to learn that it's six years old.
Then, learn more ... and thanks to J for posting the link.
The Representation Project
Miss Representation is a 2011 American documentary film written, directed, and produced by Jennifer Siebel Newsom. It explores how mainstream media contribute to the under-representation of women in influential positions by circulating limited and often disparaging portrayals of women. The film premiered in the documentary competition at the 2011 Sundance Film Festival.