It's hard to even imagine how to make a mind - build a brain - that does what's 'right', what it 'should'. We, the humans who have to build that mind, don't know what's right a lot of the time; we change our minds about what's right, and say that we were wrong before.

And yet everything we need has to be inside our minds somewhere, in some sense. Not upon the stars is it written. What's 'right' doesn't come from outside us, as a great light from the sky. So it has to be within humans. But how do you get it out of humans and into a new mind?

Start with what's really there in human minds. Then ask what we would think, if we knew everything a stronger mind knew. Ask what we would think if we had years and years to think. Ask what we would say was right, if we knew everything inside our own minds, all the real reasons why we decide what we decide. If we could change, become more the people we wished we were - what would we think then?

Building a mind which will figure all that out, and then do it, is about as close as we can now imagine to building something that does what's 'right', starting from only what's already there in human minds and brains.