Barbarian observes:
But humans are quite capable of directing their own evolutionary path(s).
But yes, the tool-making of early humans, like H. habilis and H. erectus reduced the need for robust jaws and teeth, which then became smaller.
This process appears (from my minute study of it) to happen over a very long period of time, but we can certainly not do something as I described in the “blue whiskers” example.
It can only work with whatever variation exists. However, numerous societies have decided who will live and who will not, and that does make a difference.
but my point was that we are unable to directly will such things, especially arbitrarily (which is what my example pointed to).
For example, people who were unpredictably violent were more tolerable when we had nothing but fists, but in barbaric societies, such people are quickly removed, because with weapons, they become dangerous.
Hunter-gatherers tend to be bigger and stronger than farmers, because they are generally better fed. But that changes us. Medieval humans, in a rather extreme example, were much smaller than humans before or after.
Barbarian
In terms of designing things, of planning for the future, etc. we differ from chimps in degree, but not in kind.
There are a few important things in human behavior that chimps can’t do, but designing isn’t one of them.
I would say we differ in sensate vs. rational.
Chimps are quite capable of rational behavior. In one case, apes built a crude ladder to escape a zoo enclosure.
“it’s not so much that animals are intelligent for the things that they can do, but that we don’t appreciate the wonders that we are able to be achieve by using only our animal/sensate powers.” I think Mortimer Adler’s book, The Difference of Man and the Difference it Makes, would be a helpful one for you in this area, as it seems that it is a question that you are unsure of (cf. your thoughts below this one on rationality). While I’m at it, I would also recommend Fr. Norris Clarke, S.J.'s The One and the Many, which could be a great help to you in continuing to synthesize your faith with science.
I have no faith in science, since science requires data, not belief. Hence, I accept that apes show mental capacities that we used to think were ours alone, because the evidence shows it. I don’t think this is particularly shameful or destructive to faith in God, although it is a bit unsettling.
Barbarian
I hope not. I have been told by some that an immortal soul is the consequence of a sufficiently developed nervous system. I’m not sure that I buy that. What if we do produce rational machines?
But apes show planning, forethought, humor, and even (alone with humans, so far as we can tell) empathy in the sense of being able to infer mental states in others. They apparently even have some sense of the numinous; Jane Goodall reported one evening, the whole troop of chimps were transfixed by the glory of a particularly beautiful sunset.
I don’t believe that they have immortal souls, but I would not kill one, unless it was to save a human. And something else; for those apes who have been taught to sign, their trainers say that the one thing they would never tell the apes, was that they would eventually die.
That is a sobering thought.
This is a reductionistic and materialistic view of man that is definitely not compatible with Church teaching on the human soul.
I’ve said nothing about the human soul; this is all quite naturalistic. John Paul II (I think) said that the soul is not merely an epiphenomenon of the nervous system, so the fact that apes have mental capacities much like ours, that’s not an offense to Catholic faith.
For a little argumentation against it: a crucial problem with this theory is that it does not allow for abstract thoughts to occur.
If I could show you that a chimp can infer your mental state, and act accordingly, would you think they can manage abstract thought?
If the thoughts which we have were strictly materially based (which would restrict it to the sensory (name removed by moderator)ut which our brain [which is not our mind, BTW] receives), then how could we know about things such as gratitude?
Do you think apes are incapable of gratitude? Would you say true altruism (as opposed to protecting one’s offspring) is impossible for an ape?
And, not stopping there, how could we recognize an act of gratitude among a variety of circumstances? If it were strictly material, we would recognize only immediate acts and not be able to distinguish them as “gratitude,” but as “act.” Or a dog. Why do we call both a Chihuahua and a Golden Retriever “dog”? It is not because they look the same, because they obviously don’t.
Interesting. Show me that apes don’t recognize dogs as a category. One ape, in particular, was able to accurately classify all sorts of things as cats, including a stuffed one.
Are animals enthralled by St. Peter’s, Rembrandt, or Mozart? Are they able to classify and distinguish and appreciate these from other buildings, paintings, or pieces?
So, a chicken doesn’t fly, because it can’t fly to South America? This is a difference in degree. BTW, apes who can sign, do express awe. Obviously, the beauty of a sunset isn’t as sublime as that of “Eine Kleine Nachtmusik”, but the effect on me is somewhat the same.
I wouldn’t be hesitant to attribute the characteristics you listed to sensate capabilites
I guess it’s true that reason is dependent on sensory functions, but not entirely. Chimps seem to be able to reason by visualizing a solution.
(as well as a tendency of humans to anthropomorphize animal reactions (cf. Jane Goodall)
There are ways to test this. Would you like to know how we learned that chimps can infer mental states in others?