According to Yan Shuangshuang, there are many small tribes of dozens of people around the Power Tribe. These small tribes often disappear for various reasons each year; in any case, their lives aren't going well.
Once their own tribe has absolute power and plants high-yield sweet potatoes, they can recruit these struggling small tribes. Not all small tribes have their own deity to believe in like the Power Tribe, and then fall from great tribes to small ones.
Small tribes without a deity are likely to join other great tribes, but in these times it's hard for tribes to even feed themselves, so they typically won't accept small tribes with no combat power to add a burden.
Yan Shuangshuang's initiative to integrate small tribes is groundbreaking for this world, but the prerequisite is that both the Power Tribe and the Lanshan Tribe must first master formidable strength.
