Alex Johnson said:
Do caravans really work? I've noticed when I create trade routes, even all the way across the world on other continents, that they aren't worth much per turn and they diminish or vanish after some unknown amount of time. For example, London might create a trade route with Washington. It would give 4gpt at first, I'd come back to London many turns later and see 1gpt with Washington or maybe even no trade route.
don't switch to much the goverment:
generally all those goverment changes (dispite the ones you 'GO HiGHER')
are bad 'times' -
STAY with republic or democracy when you did reach it (if necessary in times of war with up to 3-4 entertainers at big cities and 10-20% luxuries)
markets, banks, colloseums maybe temples and courts(if just republic) are absolutely 'MUST HAVEs' at a certain stage of cities developement,
at least ONE wonder like BACH, CURE or WOMEN's Suffr. MUST be 'yours' additional (at best ALL of them)
(try to buy or raid AI cities with BACH, CURE or WOMEN's Suffr. first if reachable)
and 'you can do what you want' with your people and resources at democracy.
with ~10 cities at "10" and even just that caravan generated 3 trade routes 3-4gpt (between YOUR cities) income per city you'll be at ~400gpt up to ~700gpt income per turn.
even at ~1000AD - 1500AD at PRiNCE/KiNG you should be able to buy/bribe enemies' cites (not the biggest) all few turns and so on...
in a later (tech. developed) stage equipped with armors and transport ships i wouldn't buy cities anymore - then it's raiding time (cheaper) -
in most cases (except for a city with BACH, CURE or WOMEN's Suffr.)
it makes no sense to buy an AI city for ~3000 - 4000gold.