We can tell them stories of love and how they have benefitted humanity. We can contrast those with stories of hatred and violence and the negative consequences they have on the socieity for thousands of years. Children need to hear the truth as to how bad "evil" can go so that they learn to appreciate love and practivceit to be good citizens of the world.
We must first show them that we really love them. Let them see that love that exists between children and patent. It will go a long way in helping them to love others around them.
Love between people is lived. Attempts to teach them fail if love is not part of your every-day life and if there are no living models for love, understanding, empathy in the experience of interacting humans.If this situation exists, then academics use to write a textbook with the title "Introduction to Love", for example, and they use historical text examples to show what was once meant by love.
However one should prepare robots, which are now highly praised as effective aids for teachings and learning, also with an introduction in love, understanding and empathy for their role as substitute humans.
It has become common today not to answer a question anymore, but to specify a URL and watch a video on youtube or another portal. That's all people need today.
The success of films and books on the subject of love proves that there is a great need and that these tools can also be successful tools.
On the other hand: The ability to develop one's own spontaneity and activity is no longer necessary. It is only a small difference whether I read something about love, watch a movie about love or whether robots instead of me love themselves.
So love becomes a product that doesn't even have to be bought is online, available for free on youtube. On these we have become a lovable world society. Or, to put it with Aldous Huxley: What a "brave new world!"
There are a lot useful things online, also regarding love. Thanks for this. Psychologists and counsellors teach us love, charity, empathy, social participation - undoubtly the human being has lost such feelings of love therefore they must be taught. What a miracle that the world today loves itself so intensely in this way - apparently - as it was never the case before. Never has the love between the current president of the United States and the leader of North Korea been greater than now. Because they had read a book on love before, or had watched a video before - each one for himself, of course. And also the love between Iran and US top politicians has developed in a wonderful way. Should children see a role-model in the behavior and interests of the adults? They get a better view than hearing the wisodom of their parents if seeing the deals of the leading politicians who love their people, certainly.