I alway seem to lag behind on population longevity until I get medicine and can start building hospitals. Whats a good strategy for longevity in the early to mid game? I try to get aquaducts, graineries,markets, and grocers in all my cities as early and quickly as I can (balanced against military needs). Few if any of my ities are smellies, but yet I lag behind in the early going. Can longevity be tied to leader traits?I generally go for org/ind or org/fin leader.