[quote=@MangoJuice]
The problem I sometimes have with time is that, let's say the RP takes place over a few thousand years. That's hundreds of generations that your civ would go through, and therefor no realistic persistent characters. Not to mention that even simple interactions between civs would often last decades.
[/quote]

Time in this RP is like Fight Club.

I usually do my posts as discrete rather than sequential events, so they stand as little snapshots of what is going on at the given time. As well, I always said that interaction actually takes place during the time period of the first post, but that subsequent interaction posts are just what happened in the past. It's not a perfect solution but it resolves some of the inconsistencies.