SOCIETY
Traditionalism (low upkeep)
Slavery (Masonry, low upkeep): +1 production for Quarry, +1 commerce for Plantation, can use slaves*
Manorialism (Calendar, low upkeep): +1 commerce for Farm, Watermill, +1 production for Pasture, +50% worker production**
Caste System (Contract, high upkeep): +1 food for Plantation, +50% improvement construction speed
Individualism (Civil Liberties, medium upkeep): +1 commerce for Village, Town
Totalitarianism (Psychology, no upkeep): +2 production per angry citizen, no war weariness, +25% military unit production
Egalitarianism (Civil Rights, high upkeep): +2 science per specialist, double artist, scientist, engineer slots
* I plan to rework slaves to also have them reflect ancient slavery, probably by having slaves created on city conquest
** Currently thinking about increasing worker cost, reducing starting workers and instead give the ability to construct a few improvements for free, and limit the number of workers per civ (e.g. one per city)