This mod increases the minimum distance a Settler has to be from existing settlements from 2 to 4.

Effectively this means a Settler cannot create a new Vassal Capital too close to existing Capitals/Vassals/Towns. Whenever that happens in Millennia, it just severely weakens both the new Vassal, and the old Vassal/Region. This also helps reduce cases of the AI awkwardly settling in between your Regions, or pointlessly hampering their own growth.

This mod also strongly discourages the AI from placing a new capital directly contacting existing borders, instead leaving one buffer tile.

Since this mod will tend to increase the distance between Capitals and Towns, consider combining it with a mod that increases the reach of Roads, such as:
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3316325889

For the 3 tile version:
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3317783476

This mod increases the minimum distance a Settler has to be from existing settlements from 2 to 4.

Effectively this means a Settler cannot create a new Vassal Capital too close to existing Capitals/Vassals/Towns. Whenever that happens in Millennia, it just severely weakens both the new Vassal, and the old Vassal/Region. This also helps reduce cases of the AI awkwardly settling in between your Regions, or pointlessly hampering their own growth.

This mod also strongly discourages the AI from placing a new capital directly contacting existing borders, instead leaving one buffer tile.

Since this mod will tend to increase the distance between Capitals and Towns, consider combining it with a mod that increases the reach of Roads, such as:
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3316325889

For the 3 tile version:
https://psteamcommunity.yuanyoumao.com/sharedfiles/filedetails/?id=3317783476