Humans are now surviving in a completely different way than Darwinian principles.
Technology is the name of the game. Over populate at the expense of the eco-habitat; drugs to combat disease ; vaccines to avoid death by naturally occurring pathogens. Using up the natural resources of the planet. So it goes on. All these cannot maintain the species forever. Something will give eventually - likely some gene or virus modification will open Pandora's box.
There were no trans-globe wars before humans changed their cultural systems from local hunter/gatherer to organised societies.
Humans as a species is not altruistic at all. Humans prefer to destroy, rather than live in harmony with the other species of the globe. Only those plants and animals which are deemed to improve the wealth of humans are encouraged to thrive (but are 'modified' to suit the humans, all the same). Scant 'reservations' are reserved as small areas which limit wildlife, but just sustain it from extinction.
Think about it simply.