Oof, that paper I read was such a long time ago. I have searched around for it, but I haven't found it yet.

Anyway, Im not sure I was totally clear in my comment. I (the paper) wasn't making a point on the morality or anything about selfish vs altruism. It was only making a point about the stability of the systems that contained both traits.

The completely selfish system was unstable as it led to self destruction.

The completely altruistic was also unstable, as the merest introduction of a selfish trait (via mutation or otherwise) led to it gaining rapid dominance (as it harnessed more resources selfishly) over multiple generations.

The finding was that a mix of the two traits was needed to provide stability to a system over many generations.

The research and conclusion was about system stability, not about what was better.

I will continue looking, my memory is hazy on how I came across it originally...