What happened once early clan families became larger, more extended groups?

They formed into a unit of community or village.

Explanation:

Once early clan families became larger, more extended groups, they formed into a unit of community or village. These extended clan families formed their own local community and villages and interestingly, the villagers shared the same descent.Often the villages also interacted with other villages and inter-marriage among different villages started to take place. It led to the growth of varied and mixed generations.