This book entitled the wealth of mankind presents a unified analysis of the important factors which determine our wealth. It describes the ways for substantially increasing the personal and national income through improvements in quality, quantity, rejuvenation, unity and life expectancy. The approach is quantitative to some extent and has been illustrated with respect to India, USA and Japan. The inquiry also covers the related aspects of unity, yoga, spirituality and the roles played by family, engineers, teachers, emotion builders, farmers, labor, wealth managers, doctors, non-players, negative players, and other forms of life and sunlight in shaping our wealth in all its dimensions. This book is an unorthodox but scientific and comprehensive presentation of a variety of practical ways to multiply the true wealth of everyone manyfold within a span of few years while at the same time nourishing the wealth called mankind and life.