Should people do goodness or not?

Should people do goodness or not? (presentation)
In my opinion, people should do goodness. There are several reasons. For instance, blood kinship, reciprocity, human nature, social subconscious and so on. Today, I will discuss the reason of blood kinship.
Obviously, it is easy to be understood. We are all children of our parents and are reared by them. If there was no goodness among people, they wouldn’t rear us anymore. Could human continue propagating if all parents didn’t rear their children (or even babies)? I am afraid that the answer is no. And not only human but all animals will disappear if there is no goodness between parental generation and filial generation. So I can say that people should do goodness at least in the aspect of blood kinship.