Are people actually independent self-replicating organisms. We are all parts of a superorganism, no?

Each of our experiences are composed of the experiences of (billions?) of other people. We aren't islands.

Do you suppose neurons consider the super organism they are part of? No. So why should humans. Yes "we" are all fragments of the unified human experience, but our role, as individuals is to live as individuals.

Hmm, not sure I agree. I think our role is to create a harmonious global society. But to do that, we need to take care of yourself, our friends and family, etc.

And do neurons know about us? Well, they only know what they know. I think what they know could potentially be an empirical question. Some neurons are far more complex and connected than others.