The Theory of Productivity seeks to explore the genius of American culture and identify ways to put these ideas and values to work in order to be productive. The book draws on author Sunday A. Aigbe's experiences as a student, educator, researcher, author, entrepreneur, and human services employee in the public and private sectors. He identifies key lessons learned along the way during his sojourn in Africa and the United States. The approach is a symbiotic analysis of research data and participant observations of American culture over the last thirty three years. The goal is to provide young and middle class Americans and immigrants with evidence-based knowledge and skills needed to become productive members of American society within a reasonable period.