Maths

We can blame beer.

Growing beer demand using wild grain bread for the yeast source ⟩ settling permanently allowed increased agriculture ⟩ agriculture necessitated protection from thieves and raids ⟩ establishment of nobility (military) and temples (religion, math, and literacy ⟩ money is invented to facilitate the collection of taxes for protection and public works (yes, government and organized religion started as a parasitic voluntary protection racket) ⟩ life got harder, nourishment got worse, but hey, at least they had beer.