I'm sorry, this is nonsense. Serfs worked fields in small groups in housheolds of 5-8 individuals[1] and communally feasted dozens of times per year not to mention attending religious services. Hunter gatherers spen(d)t hours a day just gossiping[2] and engaged in communal rituals[3].

We also know from studying prisoners that isolation breaks peoples' brains[4].

[1] https://acoup.blog/2020/07/24/collections-bread-how-did-they...

[2]https://link.springer.com/article/10.1007/s12052-010-0306-1

[3] https://www.taylorfrancis.com/chapters/edit/10.4324/97804294...

[4]https://www.frontiersin.org/articles/10.3389/fpsyt.2020.0084...