Carson's book certainly belongs on the list. Like Nader, she simply made stuff up (http://reason.com/rb/rb061202.shtml), and panicked people into supporting needless, costly, and damaging legislation. But while it's difficult to pin many deaths on Nader's lies (the Corvair was as safe as any car of its time), Carson, by convincing so many people, on no evidence whatsoever, that DDT is bad for humans, is indirectly responsible for millions of deaths by malaria in countries that would still be using the stuff if not for this panic.