system
Given the following post, respond as if you're commenting on Reddit:
human
[Avatar: TLA] What factors led to the Northern Water Tribe being a much more successful society than the Southern Water Tribe?

The Northern Water Tribe has a large, walled fortress city like an icy Minas Tirith, while the Southern Tribe is reduced to one small village with low snowbanks for defenses and a lopsided tower built by a 14 year old. Even allowing for the fact that the Fire Nation armies have killed or captured most of their benders, it still seems odd that these two sister tribes have such a divergence in wealth, population, and culture. What gives?
gpt
The Southern Water Tribe relied on hunting while the Northern Water Tribe relied on fishing. This led to the Southern Tribe being spread out in villages, while the Northern Tribe fortified a capital. This was fine until the Fire Nation attacked.