[Endoperez]

There is no way to negotiate with the computer players. Computers won't attack you if you have strong province defence near them, will keep fighting with you if you attack them, might stop attacking if you don't attack them, and are very angry indeed if you kill their god, even accidentally.

In multiplayer, some people might try to rush you in the very early game, others ask for a mutual warn-me-3-turns-before-you-attack or no-hostilities-for-20-turns pacts, some sell worthwhile magical items for a price, etc. If you're interested in learning about the multiplayer diplomacy, start following one of the threads in multiplayer subforum. It's all really complicated.