After analyzing the behavior of more than 50 species, Lorenz concluded that in heavily armed species, evolutionary selection also developed a strong innate morality — an instinctive ban on using all weapons in intra-species clashes, especially if the defeated demonstrates submission. On the contrary, weakly armed species have a weak innate morality, since the strong innate morality of such species is evolutionarily useless. Man is by nature a weakly armed species (the attacker could only scratch, not dangerously hit, bite or stifle, and the victim had enough opportunities to escape). With the invention of artificial weapons, man became the most armed species on Earth, and morality remained at the same level. (from the wiki about Conrad Lorenz)