Some Thoughts About Morality II

In Some Thoughts About Morality I, I discussed briefly about the origins of 'right' and 'wrong' and what follows from adopting the view that we ought to act morally because it follows from intuitions (conscience). I ended the post with an introduction to the "evolutionary" theory of morality, giving neither a clear nor comprehensive account of what it is about. 

As I was writing Some Thoughts About Morality I about five months ago, frankly I was at that point unaware of the literature in Evolutionary Psychology.* While I was quite illuminated by some of the material that I then came across, I will try to present my initial idea here in a non-scholarly way as I had originally intended.** 

The original "evolutionary" theory of morality is this. The claim is that there is no intrinsic value to morality, i.e. morality is not something that's good only for its own sake: morality is good only insofar as it contributes to the reproductive fitness of human beings as a group.*** The very rough idea is that if you assume there are two types of human beings in the world: (1) moral, altruistic ones versus (2) immoral, selfish ones, Group A with more moral individuals will have more reproductive fitness than Group B with more selfish individuals.

The red dots represent altruistic/moral individuals, while the blue dots represent the selfish/immoral individuals. The claim is that Group A (with moral individuals) is more likely to survive through natural selection. 

Why is this so? What is the evidence? One good reason that can be given is that such a picture of morality seems to best explain a lot of the following phenomena:

• Altruism and selfishness (or moral and immorality) is found across all societies. 
• Feelings about right and wrong (i.e. conscience) are universally found across cultures. 
• The apparent lack of a rational basis for morality. For instance, it is difficult to give a good fundamental reason for doing something morally than not. Also, how often do you feel that there are just no right answers to certain moral debates, regardless of by how much our scientific knowledge will advance?
• Why our conscience seems to emerge "naturally" like our ability to develop thought. Just think how feelings of guilt and compassion (can) emerge in humans without learning.

The plausibility of the "evolutionary" picture of morality lends support to the view that it is indeed representative of how the world really is. Interesting, such a picture of morality also fits well into the "Stag Hunt" example in Game Theory. The Stag Hunt example illustrates a situation where two individuals are always better off if they work together: if Jack and Jill go hunting separately (defect), they'll only manage to catch a rabbit each; if they cooperate and hunt together, they'll be able to catch a whole stag (which we'll assume that half a stag is way better than one rabbit). 

This table shows that cooperating is always the best outcome for the two individuals in a Stag Hunt game. (Photo courtesy of Wikimedia Commons)

Analogously, in the evolution story, what seems to have arisen is that individuals are always better off  together if they act morally. This includes not killing or injuring each other and not to act in ways which endanger the whole group (which is why we hate traitors). This is why Group A is more likely to survive than Group B: acting cooperatively increases their survival chances. 

Quick note: the reason why we still have selfish and evil individuals now may be due to the fact that the system fails to effectively "prune" the free-riders and those who are good at cheating. It's not difficult to see how living in a group large enough and possessing cheating skills good enough prevents these guys from being kicked out of the group. They get to enjoy the benefits of being in a moral society without being moral themselves.

But that's enough about evolution. IF this picture is true - what does all this say about morality? Should we be moral, just because we are born with a conscience? I suppose what all this tells us - if it is true - is that if we really want to fit a picture of morality with the rest of our knowledge about the world (particularly, scientific knowledge), we might need to resort to treating morality as something that is great as a means to an end. Psychologically, believing in this picture may lead us to treat morality less seriously, and we'll be worse off because society as a whole may become more selfish. To some extent, the "moral fabric" of society - what keeps humans working well together - relies most humans on NOT believing in this picture, grounding morality on something like "natural rights" or religion. 

Hey, isn't this an example where "ignorance (of some) is bliss (for everyone)"?

Speculative? Blasphemous? No, I don't think one post is enough to give a very comprehensive discussion of this fascinating issue. In a further post, I shall talk about Gyges' Ring and how this picture of morality fits into the story. 

*See this primer on Evolutionary Psychology by Cosmides and Tooby.

**Not to be mistaken as indicating my laziness to cite and quote /_/ 

***Reproductive fitness is measured by the number of offsprings.