Thats not true... in some cases that totally happens. ie: in new england all the wolves have been killed or captured so they dont kill livestock or edge in on our modern lives. as a result there was a huge spike in the deer population because they didnt have any natural predators... so the coyotes adapted and got huge to the point where they can take down deer! now im not saying we arent all going to die and destroy the planet from our neglegence but our mother earth wants to balance its self out... if we freakin let her