The entire cosmos is cooperative. The sun, the moon, and the stars live together as a cooperative. The same is true for humans and animals, trees, and soil. Our bodily parts function as a cooperative.
When we realize that the world is a mutual, interdependent, cooperative enterprise, that human beings are all mutual friends in the process of birth, old age, suffering, and death, then we can build a noble, even heavenly environment.
If our lives are not based on this truth, then we shall all perish.