The private pension is a curiosity in the modern economic environment. Why do profit-seeking companies pay retirement benefits to those no longer on the job? In this new institutional history, Steven Sass explores the rise and growth of the financial support system that today commands trillions of dollars of investment capital and supports millions of older Americans. As Sass shows, creating the pension system proved far more complicated than anyone had anticipated. Over the last hundred years it has evolved into a complex institution driven by congressional mandates, judicial/administrative decisions, union campaigns, political debates, and the ministrations of lawyers, economists, human resource specialists, actuaries, and insurance experts. Sass traces the U.S. pension system through to the present day, exploring how our modern corporate economy is confronting the challenges of an aging population.