Are Orcs That Bad?

[Morthoron]

There was always something disconcerting in the passage from "Over Hill and Under Hill" in The Hobbit:

It is not unlikely that they invented some of the machines that have since troubled the world, especially the ingenious devices for killing large numbers of people at once, for wheels and engines and explosions always delighted them, and not working with their own hands more than they could help; but in those days, and those wild parts they had not advanced (as it is called) so far.

Now, what is particularly troubling is that they hadn't advanced so far as of yet. I do believe Tolkien is intimating that Orcs (or at least Orkishness) will continue to proliferate long after the time period of the tale (and, although it had not yet been written, far further than the events of the Lord of the Rings, which occurred a few score years after The Hobbit).

I had always wondered, given that Tolkien later gave up on the idea that Orcs originally came from elvish stock, and rather arose from mortal men, that Orcs eventually blended into the human race. I know we discussed this somewhere before, but I still find the concept fascinating (and this is especially true when some people look downright Orkish, particularly when vehemently angry -- the distortions of the faces of folk in a frenzied mob look subhuman).