Book excerpt: Building the Fourth Estate reveals the crucial part played by the Mexican media in the country's remarkable recent political transformation. Based on an in-depth examination of Mexico's print and broadcast media over the last twenty-five years, Chappell Lawson traces the role of the media in that country's move toward democracy, demonstrating the reciprocal relationship between changes in the press and changes in the political system. In addition to illuminating the nature of political change in Mexico, Lawson's findings have broad implications for understanding the role of the mass media in democratization around the world. -- from back cover.