... I see the more they work, the more the levels increase, but ... the unskilled captive ... maximum levels are only 4/5 (?) although i had chosen the bonus: "Captive Skill +1" (it's not different with when I didn't choose Captive Skill +1). ...
... I had played some sandbox games that highest level of my captives is 5 (Captive Skill +1)! They are unskilled, though ! ...
Let me speculate as a novice player.
A couple of principles:
- Captives improve their skills only through work. (Schools are for Pirates only.)
- Captives come in two "flavors" - Unskilled (may take many occupations) & Skilled (only one occupation)
[li]Unskilled Captives may never exceed level 3 through their own learning.
Therefore, Unskilled Captives may get to levels 4 or 5 only
by the operation of the bonuses mentioned. They will never function at the higher (if any) levels of the Skilled Captives.