In cases where modern science disagrees with what's written in historical documents, there are usually strong reasons to prefer the conclusions of modern science.
Do you know of any modern scientific results which would prove that if members of a group stop supporting their group, than that group will not have reduced chances of survival?
It's motte-and-bailey.
Don't worry, I will not "go back to claiming" that "genetic traits in individuals develop for the main purpose of making the group fitter" after the discussion is over. :) I honestly didn't held that belief. I only held (and still hold) the belief that the survival of the fittest can also apply in the case of competition between groups, which is not something which is disproved by the arguments against group selection.
On the other hand, this discussion made me think about the possibility of people confusing the above with the term "group selection", and having read that "group selection is obsolete, not supported, and wrong" might conclude that it's not true that groups adapt, change, and get stronger or get destroyed based on how fit (how well group members are supporting the group also making part of the fitness of the group) and how adaptive they are compared to other groups, although this is not what group selection is about.
This sort of thinking seems bad:
This sort of thinking seems socially frowned upon, but accurate:
Similar points could be made by replacing a/b with [group of people]. I think it's terrible to say something like:
But to me, it doesn't seem wrong to say something like:
Credit and accountability seem like good things to me, and so I want to live in a world where people/groups receive credit for good qualities, and are held accountable for bad qualities.
I'm not sure though. I could see that there are unintended consequences of such a world. For example, such "score keeping" could lead to contentiousness. And perhaps it's just something that we as a society (to generalize) can't handle, and thus shouldn't keep score.