To what end?  People aren't rational so the situation can't be discussed rationally thus it isn't going to be solved rationally.  It's going to be solved Biologically:

Poor sanitation can foster transmission of all sorts of nasty bacterial bugs. But a new study has found that among common bacteria, antibiotic resistance is brewing in the New Delhi water supply--and spreading in at least 20 strains, including some that cause dysentery and cholera. "

A commonplace finding of Ecology is that when a species' population expands beyond the carrying capacity of its ecological niche the population numbers collapse.  Doesn't matter if the species is lynx in the Canadian arctic or human beings living in Chaco Canyon or Easter Island.

She believed in nothing; only her skepticism kept her from being an atheist. -- Jean-Paul Sartre