Totally agree regarding biking, walking, trees, mountains, and will add lakes. Though it does only lightly touch on social structures of traditional societies, you may enjoy reading "The Secret of Our Success: How Culture Is Driving Human Evolution, Domesticating Our Species, and Making Us Smarter" by Joseph Henrich. I also found classic texts of social and political anthropology to be very worthwhile for understanding human societies. Ted Lewellen's "Political Anthropology: An Introduction" is a good starting point.

There's an appropriately minimal comparison with runit in her slides (PDF) from a talk she gave in 2024: https://leahneukirchen.org/talks/#nitroyetanotherinitsy

What I got from looking at that comparison is that runit starts a separate supervisor process for each process started. I like the cleaner process tree of nitro, but I wonder what the tradeoffs are for each.