Much is right in the world, but also much is wrong. This book is mostly concerned with what is wrong. It is not a book of criticism and condemnation.It is one of explanation, optimism and hope.It promotes the doctrine that we,as individuals,can save our world.Little is wrong in the world except what is caused by people‘s intentional or unintentional misdeeds. True, there are occasional earthquakes, floods, windstorms or famine. But the seasons go along in reasonably orderly succession, and the vegetation renews itself each year without fail. That has been true in the past, and although the pattern may change at any time，it will presumably be true in the future.So it is clear that nature is not the culprit（罪魁祸首）.Most of everyone‘s suffering is caused by people.There is no use dodging that basic fact