re: #186 Charles Johnson
I cannot persuade myself that a beneficent and omnipotent God would have designedly created parasitic wasps with the express intention of their feeding within the living bodies of Caterpillars.
— Charles Darwin
Carl Zimmer’s _Parasite Rex_ is a real good short tome on this subject for a layman’s education on how parasites have driven creature evolution to some degree. Part of the on-going arms race that is Life.