Rachel Carson's message was about the potential environmental damage from use of pesticides. She was particularly concerned about the long-term effects of pesticides, which were unknown at the time she was writing. She aimed her message at the average citizen rather than at scientists.
Silent Spring is widely credited with being one of the major forces that created the environmental movement in America. The book was published in 1962, and US President John F Kennedy soon tasked his Science Advisory Council to study the allegations that were made in the book. Their report put Washington on the path toward a number of pieces of environmental legislation, most notably the outright banning of the pesticide DDT.