maybe instead of parenting or breeding there could be a tech/skill called Socialization, or Caretaking, or something along those lines.

people could get skills for parenting and teaching, as they do now, but other activities could be added

for instance, there could be a food prep table, not only would there need to be food collected, but prepared for consumption as well. maybe prepared food would feed more people than raw food consumption would. tech levels and combinations could be necessary for the discovery, or invention of cooking implements, or larger baskets to gather food in the first place, tools to help with the fishing and farming

they could require insane tech points, to keep things from getting easy early, but it would add to overall game play

it could be a secret tech discovered only after all of the others have been bought and all other puzzles completed

to make toold there could be a "mine" or something of the sort, and adept and master builders could go gather ores to be made into the tools