Since my wish clause is that things have to get better for the most people possible, if the poor people in small groups suffering manage to become 51% of the living humans then something would go wrong in the underwater city like it springs a massive leak killing all the ultra rich.
The massive leak of good nutrients gives some new food source to a species just managing to survive. This species with a food source thrives giving the opportunity for the small groups to coexist on the razor edge of survival as long as they live in harmony with the species.
Since my wish clause is that things have to get better for the most people possible, if the poor people in small groups suffering manage to become 51% of the living humans then something would go wrong in the underwater city like it springs a massive leak killing all the ultra rich.
The massive leak of good nutrients gives some new food source to a species just managing to survive. This species with a food source thrives giving the opportunity for the small groups to coexist on the razor edge of survival as long as they live in harmony with the species.