UPB talks about how things like theft, deceit, murder cannot be posited by a moral theory to be "good" because this argument self-detonates. Put another way, the idea that "X is good" (where X = {theft, deceit, murder}) is not consistent with reality.
This got me thinking that while the idea that these things are "good" is not consistent with reality, the knowledge that they can happen permeates our reality nonetheless. I'd like to do a thought experiment in which none of the actions that we're labeling as "immoral" could possibly take place, and compare the resulting world to our present reality. Or perhaps it would be more realistic to start with our present world, ponder removing immorality from it, and see what effects that has.
What I'm wondering is, if we can come up with ways in which our present reality - which includes the ever-present possibility of theft, rape and murder - is better than the imaginary world in which they're not possible, would that mean that although they clearly don't work as universal moral principles, they are being kept in the mix because their presence as threats somehow produces better results than if they weren't possible threats. I think what I mean by "better" is that, much like with natural selection, it doesn't matter so much what we think, as what works, survives, and self-propagates in practice. (We've used natural selection/"survival of the fittest" to remove God from biology; it seems to me that a similar line of reasoning could be used now to remove him from ethics.)
I'm not saying I'm going to be happy with the results - I'm also not
happy with the knowledge that if I enter a lion's den I'll likely get eaten - but I would like to increase my understanding of reality. (The reference to the lion's den alludes to the biblical story about Daniel. Although I'm sure every human would like for there to be some God protecting them from lions should they ever enter a den, that desire doesn't make it such. Survival of the fittest prevails.)
Perhaps, if we determine that (the threat of) "immoral" actions have somehow acted as driving forces in the development of the world, being the scientifically advanced humans we now are, we can think up more civil/effective ways of achieving those same ends. Or better understand ways in which this is already happening.
What do you guys think? Would this be an interesting line of reasoning to pursue? Have I already gone astray somewhere? I've got some ideas for the thought experiment brewing in my mind, but I wanted to see what people think of the hypothesis and methodology, before I start to flesh those out.