Mass media plays a significant role in shaping society and culture by influencing our identities, notions of gender and ethnicity, and sense of self. Media images and stories provide the symbols and resources through which we understand ourselves and our shared culture. Communication theory examines the relationships between media and politics, the influence of media on social issues like crime and violence, and the economic and normative aspects of media such as freedom of expression and commercialization. Theories take either a media-centric view that emphasizes the autonomy of media, or a society-centric view that sees media as reflecting broader social and political forces.