Why do nomads even have walls?

[GhostDanny]

Walled cities were common, what are you talking about? Are you maybe confusing modern cities which were just towns back then?

Towns?! More like scattered collection of houses and other buildings XD

 

[DiabloDeVille]

Towns?! More like scattered collection of houses and other buildings XD

? In Europe?

 

[GhostDanny]

? In Europe?

A town typically required a fence or small wall, to be called a town.
Village makes more sense.

 

[Delterius]

Tier 1 being a village, when surely every empty space is a village surely, is quite jarring, along with jumping straight from village to large city

Well, Tier 1 isn't a village it's a 'village center'. I think the idea that is that urbanization happens in two steps. First a village center appears, which implies there are other villages around it. Then the surroundings grow themselves, leading to a conurbation that turns the suburban continuum into a single 'large city'. The process then repeats, with the formation of a 'city center' followed by the growing of further surrounding towns into a single 'large metropolis'.

 

[DiabloDeVille]

Well, Tier 1 isn't a village it's a 'village center'. I think the idea that is that urbanization happens in two steps. First a village center appears, which implies there are other villages around it.

The village center is the center of many villages to you? Not the center of a single village?

Then the surroundings grow themselves, leading to a conurbation that turns the suburban continuum into a single 'large city'. The process then repeats, with the formation of a 'city center' followed by the growing of further surrounding towns into a single 'large metropolis'.

Could be conurbation ala rhodes, or could just be one town constantly growing and taking over other village's farmland ala london