The relationship between business and politics is crucial to understanding Mexican history, andPesos and Politicsexplores this relationship from the mid-nineteenth century dictatorship of Porfirio Diaz through the Mexican Revolution (1876–1940). Historian Mark Wasserman argues that throughout this era, over the course of successive regimes, there was an evolving enterprise system that had to balance the interests of the Mexican national elite, state and local governments, large foreign corporations, and individual foreign entrepreneurs. During and after the Revolution these groups were joined by organized labor and organized peasants.