Imagine the world is a pond and the people within it are fishes of all different sizes.
Overtime through social or existential Darwinism the large fish through predation eat all of the smaller fish and other smaller lifeforms within the pond as well. The social Darwinists will exclaim, "Ah, this good and perfectly natural as the weak deserve to be destroyed where the strong deserve success in life where all of this is perfectly natural or acceptable."
Of course what has really happened which will become known overtime is that the larger fish have exhausted their food sources through over-predation where they're now facing the reality of food scarcity with starvation. Their only choices now is starvation or self cannibalizing to merely survive overtime. Indeed initially many do starve to death and those that do not overtime adapt in self cannibalizing each other. With cannibalism they survive just a little bit longer until there are just two fish that are left. For one to live for a little bit longer the other one must die but even by killing the other fish the final remaining vertebrate has practically damned itself since it is left alone to die by itself and with that all life of the pond becomes extinguished until there is nothing living within it any longer.
I guess what I am concluding here is that with the discussion of social Darwinism, game theory, or competition there is no long term objectivity concerning the concepts and almost all references of over-predation is completely lacking.
