It is a sad fact that on this earth at this late date there are still two worlds, "the privileged world" and "the forgotten world". The privileged world consists of the affluent, developed nations, comprising twenty-five to thirty percent of the world population, in which most of the people live in a luxury never before experienced by man outside the Garden of Eden. The forgotten world is made up primarily of the developing nations, where most of the people, comprising more than fifty percent of the total world population, live in poverty, with hunger as a constant companion and fear of famine a continual menace.

From his 1970 Nobel Lecture