Humankind has become less violet because if you think about it we are not like we used to be back in the old days. We don't hang colored people for no reason , we done kill ones families because we despise them, we don't do any of that so therefore humankind is becoming less violent as the years go by. What do you think?
Let me start by saying mankind IS less violent But this is not because of mankind becoming less violent, people are shown and taught from a young age that for instance, killing is wrong or stealing is wrong. But MANKIND has not become less violent for example have you ever seen a toddler? They are rude, selfish, greedy, and are down right evil. It is only due to the parents of the child instilling good morals into the kids brain slowly as the child grows up.