Friedman examines how modern life centers on human identity seen in terms of race, gender, ethnicity, and religion, and how this new way of defining oneself affects politics, social structure, and the law. Our horizontal society, he says, is the product of the mass media -- in particular, television -- which break down the isolation of traditional life and allow individuals to connect with like-minded others across barriers of space and time. As horizontal groups blossom, loyalties and allegiances to smaller groups fragment what seemed to be the unity of the larger nation. In addition, the media's ability to spread a global mass culture causes a breakdown of cultural isolation that leads to more immigration and heavy pressure on the laws and institutions of citizenship and immigration.