Mihndar's system is good, but I see one problem that might arise: say two races meet in a given year. Then imagine Player 1 posts more frequently than Player 2. When the two races will interact again, the interaction will have a different date in both systems, which is quite awkward, you'll have to admit.

I do think there was a misunderstanding when I explained the page-based system, though. Since advancement is post-based and not IC-time based, it doesn't matter whether you invent spears in 10 years or 10 days, as long as you spread it out over 10 posts.

Also, in the previous Rps, when a project took many posts to be completed, we could go a few posts without describing the advancement, but still taking it into account. In that way, even when you spend the whole post describing an interaction, you can still move your race forward, considering that in the meantime, out of the spotlight, they are continuing to do something.