THE "CASE-STUDY" form in which I have presented this account of woman suffrage in Mexico has the advantage of tracing one subject through all its various aspects. In politics, case studies have the purpose of showing a political system in motion. They inhabit that halfway zone between formal studies of government and systematic statements of political theory and depend heavily upon both without invading the realm of either. Case studies record events in the field of practical politics where politicians make and enforce political decisions. They must be bound closely to a chronological frame because the order of sequence has great importance. In tracing out this chronological development the political scholar almost inevitably will find himself pursuing his subject through every aspect of the political and governmental system: the constitution and its amending process, the territorial distribution of powers, the legislative branch, the executive branch, the courts, political parties and elections, and public opinion. The result can be a clearer picture of how the political system actually works than a more formal study of theory or of machinery can accomplish, because one is bound to a presentation of the framework of government and the other to a logical statement of political philosophy. The reader must judge how fully I have been able to realize the potentialities of this method of presentation.
In the meantime some acknowledgments are very much in order. Anyone who writes a book soon finds himself heavily indebted to a large number of people. He is obligated to the institution for which he works for not checking up too closely on how he spends his time, to his immediate boss for conniving with him in snatching hours