What’s the solution to jealousy?

Man is a social creature, as we like food, so we like people; but if that’s the case, how come there are psychopaths, who deliberately harm people, bullies, antisemites, radicals, who due to delusional superiority, hate people? the answer can be discerned from food, you see, imagine If God forbid, someone developed an allergic reaction and instead of liking food would violently react negatively from food, then two things would occur, the first is they would obviously begin to fear and as fear itself is a negative feeling, hence, hate food; the second is, they would mourn the loss of their previous pleasurable activity, now if they were the only person alive, this would end at the mourning and then coming to terms with it, as is the process in all loss, however, because they see other people who are enjoying food, a bitter rage – jealousy – develops in their bosom, a maliciousness, a desire to hurt those who dare have a pleasure they are not entitled to.

In fact, this literally has scientifically been proven – one by one, four monkeys are introduced into a cage and as each one tries to take bananas from the center, a hose of water – which monkeys hate is sprayed – so they mournfully retreat, then a fifth monkey is introduced and he normally approaches the water but lo and behold no water sprays him, so he happily eats the bananas, after which the jealousy – hatred of the other monkey, is aroused and they constantly (I.e. In every experiment) beat him up.

So what’s the solution?