This project would not have been possible without the help of many colleagues and friends. Rosemarie Zagarri, John O. Allen, and Mike Connally gave each chapter a thorough reading, offered much advice, and saved me from numerous mistakes. Emory Thomas, Mike Campbell, and Dale Baum offered many useful comments on various sections of this work presented at conferences. Larry Poos spent countless hours training me in the art of geographical and statistical analysis. Staff members at the Texas State Library and the Eugene Barker Center for American History made numerous searches and offered much useful information, and their patience is greatly appreciated. My parents' unconditional support pushed me to attain my goals. I am especially grateful to my editors, Beverly Jarrett and Jane Lago, for their continual support and patience throughout this process. Most of all, this would not have been possible without the guidance of my mentor and friend Jon L. Wakelyn, who shaped my ideas, challenged me at every turn, and offered his unyielding support. To him, I dedicate this work.