From that animalorigin, we have imported this idiom into our civilized, modernlife to representanysituation where wehumansfeel we must fight aggressively for some causeorpurpose.
Another theory of the origin of modernhumans, known as the multiregional hypothesis, holds that earlier forms of humans originated in Africa and then slowly developed their anatomically modern form in every area of the Old World.
Homo sapiens last shared a common ancestor with our robust cousins around 600, 000 years ago, well prior to the origin of both modernhumans (see above) and Neanderthals.