So I generally feel that im reactive in regards to trade routes. I tend to use them as happiness modifiers for unhappy cities but other than that I have no cohesive understanding of how to properly use them. I play on standard speed Diety. 1) What does it mean by resource diversity? 2) East India trade wonder, should I build it in the city with the best luxury resources or have it in the capital or somewhere else. 3) Should you spread out of trade routes to different cities or concentrate them all in one city? 4) Specific strategies for attracting trade routes from other civilizations as I tend to only have a handful ever going my way. Any advice is appreciated.