Insightful, but that is unidimensional and clearly not sufficient to define civilization. What other perspectives we should consider? Do you think we need to leave out some that might come quick to mind, such as "complexity", "specialization", etc.?

I heard in highschool that scale is the big issue with civilization. Anarchy, for example, can work up until people start not knowing themselves (I heard 200 then; I'd argue that this corresponds or is near of Dunbar's number 150 [1]. I don't think this was known by my teacher then, as this was first proposed in 1990 according to wikipedia).

[1] https://en.wikipedia.org/wiki/Dunbar's_number