1. Rachel Carson, who got in on the ground floor of eco-hysteria. Because of her fatuous ideas about DDT, the substance was banned globally, malaria-causing mosquitoes proliferated, and millions of people have died.
2. Dr. Andrew Wakefield, the British gastroenterologist who got in on the ground floor of autism hysteria. Because of his fatuous study linking vaccines to autism, parents refused to vaccinate their children, the result being "hospitalizations and deaths of children from measles who could have easily avoided the disease."