One of the ten best self-help books of all time -- The Christian Science Monitor "You can be a bigger person than you are," promises William H. Danforth, "and I am going to prove it to you." The founder of the Ralston Purina company, Danforth envisioned life as a checkerboard and developed a four-square philosophy, in which individuals must balance mental, physical, social, and religious needs to achieve a fulfilling, successful life...