I think that's because we don't teach each succeeding generation the essentials. we teach them everything, but. We teach them math and science and history and how and why to compete with each other, but we don't teach them how and why not to compete. We don't teach them to hold each other's well-being as being as important as their own. We don't teach them that existence doesn't exist for us to exploit, but for us to witness in awe and gratitude and appreciation.
And because we don't teach them this, they behave like ignorant pigs. And they teach their children to behave that way.
We shouldn't be surprised at depravity, even in well educated and lovingly reared people. The only solution to this is not humanistic, is not even of this world, but is the Gospel of Our Lord Jesus Christ, Who sits now in heaven at the right hand of the Father. He will return from heaven at the end of time, and then this world will pass away and be re-created, and the Kingdom of heaven will cover the whole universe. We believers will have new bodies, and death itself will finally be defeated as the final enemy of Our Lord, that the Father promised to make His footstool.
Children (and adults) need to be taught that. It will not end evil, having everybody knowing the Gospel, but it is the physiologically best way to face this evil world, that is passing away, and groaning; awaiting Our Lord's return. The more we know the Gospel, the more our inherent and latent encephalopathy, that only concludes "foolishness" when hearing the Gospel, is replaced, and renewed. Our reborn and resurrected souls can infect our dead bodies with time and growing faith in the Gospel, and this will tend to make the present world a better place, but it is not a solution to all evil. Only Our Lord can bring an end to death.