If these are the four ring wraiths then there is as yet one ring to rule them all: biophysical economics. Our evolutionary biology did not equip us for non-linear challenges of the type we now face from peak everything, brought upon by two genetic timebombs: fecundity and insularity. Clueless, we fall back on our Neanderthal genes and start throwing rocks. It won’t work. Perhaps whatever evolves out of the more radiation-resistent cockroaches or the microbes we sent to Mars will do better. Not sure what those guys will make of the radioactive black smear in the strata marking the age of homo petroleo.