For most sexual creatures, they should fight after defeating foreign enemies, and so should they.

Many different organizations and tribes compete for territory with each other, but after a fight, they don’t want to fight
Because they can feel the pain of their opponents and feel the fear of each other when they kill them.
Their perception ability is the clearest for the same kind of people.
So they … Don’t want to kill their own kind.
In the end, each individual of this race decided not to fight any more, and they United.
Because they can clearly feel the feelings of their peers, they also try to avoid hurting their peers.
They gradually formed a United text without deception, harm and crime.
These creatures also specialize in pursuing happiness and staying away from pain
Then they quickly pay attention to the creatures around them.
They found that the living things around them were still in "misery", and their struggle for food was full of pain.
They want to free all living things in the whole world from suffering.
So they try to save the whole world.
It is indeed possible because they are … actually the same kind of creatures.
This means that they can also give other creatures the same’ empathy’ ability.
They do’ capacity growth’ experiments on other creatures.
And successfully create some creatures that can sense that feeling of other creatures around them.
Of course, these abilities are very’ primary’ methods to learn complex emotions at first.
In the following research, they have found that other creatures, like them, will gradually strengthen this ability.
If you go this way, you will definitely’ evolve’ into a creature that can’t harm life because you can feel the same.
So they quickly let more creatures have this ability.
These creatures with primary sensibility soon gained an advantage in the war and replaced those without ability.
Then they multiplied on a large scale, and soon they spread all over the world.
Initially led to this situation, literary creatures suddenly found that many creatures’ intelligence also rose rapidly with their ability.
Then they besieged the literary creatures.
At that time, their ability had not reached the top level, that is, they could not perfectly feel the pain of their opponents
Moreover, they think that cultural creatures are a great threat, and many different creatures unite to try to destroy them.
However, the cultural creatures didn’t develop weapons very much, and they felt the same pain every time they killed other creatures … so they didn’t react positively to the surrounding species at first.
They didn’t react until these creatures attacked and occupied some towns.
But what they do is not kill these creatures, but try to improve each other’s ability quickly to make each other realize that … this war is wrong.