I think you're missing the most likely, a descent into complete hedonism that takes away humanity's desire to live.
http://io9.gizmodo.com/how-rats-turned-their-private-paradise-into-a-terrifyin-1687584457
I think you're missing the most likely, a descent into complete hedonism that takes away humanity's desire to live.
http://io9.gizmodo.com/how-rats-turned-their-private-paradise-into-a-terrifyin-1687584457
RE: Knowledge Base #2: 10 Realistic Ways the World Could End