I'm still not catching it. There isn't one true yardstick, but there has been moral progress. I'm guessing that this is against a yardstick which sounds a bit more "objective" when you state it, such as "maximizing happiness" or "maximising human potential" or "reducing hypocrisy" or some such. But you agree that thinking that such a yardstick is a good one is still a subjective, personal value judgement that not everyone will share, and it's still only against such a judgement that there can be moral progress, no?
I don't expect everyone to agree about morality. However, there are certainly common elements in the world's moral systems - common in ways that are not explicable by cultural common descent.
Cultural evolution is usually even more blatantly directional than DNA evolution is. One obvious trend is moral evolution is its increase in size. Caveman morality was smaller than most modern moralities.
Cultural evolution also exhibits convergent evolution - like DNA evolution does.
Most likely, like DNA evolution, it will eventually slow down - as it homes in on ...
In this video, Julian Savulescu from the Uehiro centre for Practical Ethics argues that human beings are "Unfit for the future" - that radical technological advance, liberal democracy and human nature will combine to make the 21st century the century of global catastropes, perpetrated by terrorists and psychopaths, with tools such as engineered viruses. He goes on to argue that enhanced intelligence and a reduced urge to violence and defection in large commons problems could be achieved using science, and may be a way out for humanity.
Skip to 1:30 to avoid the tedious introduction
Genetically enhance humanity or face extinction - PART 1 from Ethics of the New Biosciences on Vimeo.
Genetically enhance humanity or face extinction - PART 2 from Ethics of the New Biosciences on Vimeo.
Well, I have already said something rather like this. Perhaps this really is a good idea, more important, even, than coding a friendly AI? AI timelines where super-smart AI doesn't get invented until 2060+ would leave enough room for human intelligence enhancement to happen and have an effect. When I collected some SIAI volunteers' opinions on this, most thought that there was a very significant chance that super-smart AI will arrive sooner than that, though.
A large portion of the video consists of pointing out the very strong scientific case that our behavior is a result of the way our brains are structured, and that this means that changes in our behavior are the result of changes in the way our brains are wired.