[PvK]

I agree that eventually people would move to repopulate devastated lands. The rate at which it would occur is what we might or might not agree on. The conquest of America is of course an example of population migration, in the industrial era. A more timely example might be the migration of various peoples along the vector from Mongolia though Rus and Ukraine and into Europe. Both though seem to me more like invasions in Dominions that population adjustments. Another example to consider might be Norse attempts to spread into Vinland, which looks like a good model for medieval people trying to spread into problematic conditions. One could also look at the scale and behavior during medieval plagues. Adding detail to migration without adding detail to why migration might have problems, could be unbalanced from a realism-oriented perspective like we've been discussing.

Not that that's the orientation of Illwinter, who have mentioned some of their views on this issue over the years.

All that said, I don't see any problem with your most recent suggestions. I wonder if you can't put a negative number for a spelleffect that kills population, to mod in new spells which create population. The message would probably still be the disaster message though.

Rounding up population growth ya is probably trivial to do and I have no problem with.

PvK