I had an idea early on that the reason the AI is so peacenik like early on is because they don't have enough gold, so a solution was to make granaries, markets, banks, and stock exchanges each give +1 route and see how the AI handles it.
Needless to say, I totally forgot about how hilariously awesome internal routes are and right now, all my cities have a food route (one has a production route) feeding the capital with there being, I think, several extra routes for trade (which for now is limited with one major civ and several city-states).
Edit: Need to dig up a strategic view map of the trade routes. Trade routes in strat view are perty.
And here we go.