Another post about a possible mechanism, with a small relation with the effect of social stratification and the discussion about the tech tree:
A City could have extra yields relative to its size and depending on the population type.
Lower class could give production from the start
Upper class could give gold with currency, science/culture with "literacy" (which would represent an intermediate step between "writing" and "education")
Middle class could give gold (after economics?), science/culture with "education"
For example a size 10 city with 80% lower class, 10% middle and 10% upper would yield
8 productions
1 gold aftet currency, 2 after economics
1 science/culture after "literacy", 2 after education
A City could have extra yields relative to its size and depending on the population type.
Lower class could give production from the start
Upper class could give gold with currency, science/culture with "literacy" (which would represent an intermediate step between "writing" and "education")
Middle class could give gold (after economics?), science/culture with "education"
For example a size 10 city with 80% lower class, 10% middle and 10% upper would yield
8 productions
1 gold aftet currency, 2 after economics
1 science/culture after "literacy", 2 after education