There is almost no story I can think of which is the founding saga of a nation (from King Arthur to the Mahabharata taking in all the myths of the ancient world and those in bibles) that does not envisage some wickedness, some malevolence against which the hero or group has to fight. And not a few are all about family squabbles and betrayal of one sort or another which all leads me to suppose these have been the experiences of peoples all around the world. And we should never find that in the slightest bit of a surprise because after all, the stories are about people.
They tend to exaggerate the wickedness we find in each other in order to make the story grander but the idea of betrayal is found in every life, the ideas that embitter people are found in every family, the squabbles over property, the fights over rights, the passing down of injustice through the generations, these things are known to most individuals on this planet.
Because despite everything we may have to fear the thing we fear most is each other. The absurd irony of on the one hand talking up our genius and brilliance and on the other protecting ourselves with everything we can against each other’s wickedness and unkindness, should not be lost on any of us.