Ask Lemmy

In his work The Righteous Mind, Jonathan Haidt talks a bit about this. In my interpretation of the points he makes, humans aren’t more or less collectivist, but rather there’s points that some care for more than others. For example, left leaning individuals care more for the fairness across the group, while right-leaning individuals value conformity. From an evolutionary perspective, there’s a good reason to have increased conformity, though some would argue that in a modern world our differences are what make humanity stronger. I found this discussed it a bit, if you can’t get the book. https://www.highexistence.com/how-jonathan-haidts-6-moral-tastebuds-can-heal-a-divided-world/

He also makes a point that a shared mythology is vital to maintaining a group for a long term - communes seldom last through the second generation, while religious sects last centuries.

I’ve butchered the concepts (it is a several hundred page book), so if you’re able to get it from your library I think it’s worth reading it even if the concepts are somewhat tangential to the question you posed. It promotes a theory, which is simply one many ways to interpret a part of humanity.

In short, no, I don’t think that there’s a difference in the amount to which left or right are more communal; it’s the inclusion criteria of that community.