Board Thread:Speculation House/@comment-14138255-20141017020106/@comment-24891101-20141019054256

But I disagree that the Grimm are evolving. I do not see them as sufficiently biological to reproduce sexually, or to have heredity and different genotypes, nor do I think there is sufficient selective pressure to select for those things to any significant extent, if the world is indeed teeming with Grimm (I do think this point is arguable, and a bit weak). There is also too much variety for them to have evolved from a LUGCA in the time that their exclusive prey has existed.