I think cacian's referring to erotica involving child-sex fantasies, and books that imply conspiracies to rape children.
As for the OP... there's very little evidence to my knowledge about what the "root cause" of pedophilia is, although I've read estimates that only about 50% of sex offenders are pedophiles. The others do it for power. So the discussion has to be much broader than pedophilia if deterring sexual abuse is what you're concerned with.