Cheris Kramarae developed Muted Group Theory to describe how women and other marginalized groups have difficulty expressing themselves in public discourse dominated by men. As the dominant group, men have shaped language and communication norms in ways that disadvantage muted groups. Kramarae showed how women were muted in cartoons from the 1940s, depicted with vague language and as emotional. She has worked for over 25 years to address how muted groups can alter their muted status and gain more control over communication.