Human Events has surveyed a number of Conservative intellectuals and asked for their nominations for the Ten Most Harmful Books of the 19th and 20th Centuries. This is the result.
I can't say that I agree with all of the selections, and indeed I haven't read all of them myself, but I have to object to the inclusion among the honorable mentions of two of my very favorite works. The first is John Stuart Mill's On Liberty. I'm surprised that Conservatives, who often have a libertarian streak in them, would find it offensive. The second is Rachel Carson's Silent Spring which probably did more to galvanize action to save from extinction species like the Peregrine Falcon, Osprey, Brown Pelican, and Bald Eagle than any other single piece of writing in the last fifty years.
Most of the rest of the selections with which I'm familiar, however, do indeed belong in this rogue's gallery, with the possible exception of Origin of Species which is for the most part unexceptional in its evolutionary claims. In Origin, Darwin pretty much limited himself to evidence for micro-evolutionary change which even most anti-Darwinians do not dispute. The harm done by Darwinism is, in my opinion, more a consequence of the subsequent development of the theory, especially its metaphysical aspects, than of what is put forth in Origin.
The only other change I might make is to put Nietzsche's works at the very top of the list.