Can we be evil or good when we are all alone? Yes.
Self destruction is just as bad as other destruction.
There are many things that we call good and bad, that have no real basis, except that they are the excepted norm of that society. Eating pork, working on Sunday, etc.
However, there are things that, for lack of a better word, increase the amount of love in the universe. These are good.
And there are things that destroy, that diminish the universe. Those are evil.
We can actually measure the effect on the universe by such things. Its just that science doesn't want to believe in the metaphysical. And the science-ism wants to do away with any and all constraints on what they do, so they make arguments such that good and evil are only societal constructs.
Well, that is only your perspective that things that bring love to the universe are good. They might as well be bad in a long run, I think. Also, a devil who manages to destroy entire communities is a good devil, right? I mean, it is his job to destroy after all. What I am saying is that good and bad is just something we created to define things but in reality, everything is balanced and neither good nor bad.
Nope, I am trying to tell you in a way that might translate, that there is good and evil, and that (with future technology) you can see the difference. That there are absolutes truths.
But, you are correct in questioning what we consider good and bad, as most of the ones in the bible were written down by kings to make good little sheep of the people.
Further, moral relativism leads to personal destruction. If you destroy your compass, then you do not know where you are going, and your boat will be dashed against many rocks that could have been avoided.
Maybe you are right, but I still think that when we are alone, we are nothing. However, we are hardly ever alone. As for the technology, I doubt that there will be any way to say what is good or bad. That technology will just become a new bible to make good little sheep of the people, don't you think?