Before the humans, there were more wolves. Bigger wolves. That's also in the fossil record.
Wolves are also non-anthropogenic. You're missing a point on complexity and assuming there's some kind of stable optimum that can be maintained. The periodic, even routine, ice ages imply there is not, and the forcing mechanisms for them are completely uncontrollable. (hint: cosmic rays from spiral arms) The Geologic record since the Archean doesn't hold a lot of clues to heat crisis derived extinctions, there are a few, mostly related to volcanic events such as the Permian-Triassic "great dying" event. But for those we have a good record of, they resulted in profound acidification events, followed by fungus decay sulfide events. Remember, sulfide is as toxic to life as cyanide, it binds to hemoglobin and blocks oxygen. But even in these cases, we're inferring the CO2 is driven out of the oceans indirectly by volcanic generated sulfuric & hydrochloric acids, and the heat is simply comorbid with the environmental toxins.
By and large cold is the big killer. Flipping out over beaver dams and destroying the entire modern economy to meet a 1.5/C target by 2100 is scientific fraud. Yes, we need to start moving on CO2. No, we don't need to spool up a new dogmatic religion around it, complete with three readings of the sacraments on Slashdot per day.
