"The problem I dealt with in Silent Spring is not an isolated one. The excessive and ill-advised use of chemical pesticides is merely one part of a sorry whole-the reckless pollution of our living world with harmful and dangerous substances. Until very recently, the average citizen assumed that "someone" was looking after these matters and that some little understood but confidently relied upon safeguards stood like shields between his person and any harm. Now he has experienced, from several different directions, a rather rude shattering of these beliefs."