by Papa Clement Fri Jun 03, 2022 12:13 pm
There usually is a slight movement in figures relating to one of the following:
1. Changes in territory (buying or selling colonies, founding new towns?)
2. Famine (or enemy action in recruiting civilians?); this would also include bandit raids or other disruption.
3. Changes between category (if you build more religious buildings it tends to increase the proportion of 'church' vs other categories, who are often taxed differently)
4. Changes in EH. This is the most likely. There is a note somewhere in the rules that high EH means that the economy is booming and therefore there is a chance that civilians are attracted from neighbouring countries who may have a lower EH or famine, whereas if the opposite applies you can lose population. It does not just apply to recruits (although that is what players tend to focus on). If you assume EH5 (average over the year) then I would expect population changes from this would be minimal, but if you are at an extreme either way then it would perhaps be the reason. Sustained low EH will give you more recruits, but also lead to people seeking employment in other countries; sustained high EH will give you fewer recruits, but lead to more immigration so your population will temporarily rise? I don't have a long enough data series from different games to quantify this (G7 England regularly had either territorial changes or enemy action against population, so hard to get base figures), but if you eliminate the other causes, then this is the most likely.
It will partly depend on the scale that you have detected ... if you are seeing 10,000+ disappear then it is probably worth 'asking advisors' in case it is a typing error on the sheet, but otherwise, it is probably just one of those things you'll have to live with.