Below are a few reasons people have given me to have children and why these are not good reasons -
1. To continue one’s lineage/bloodline. First, there is nothing special about one's lineage. Second, does it matter? Once we die, we won't know what happens to the lineage?
2. To pass on property. Well, you don’t have to have children to pass your property to. It is insane to raise a child just to pass down your property. You should not have wasted your life collecting property, to begin with. Also, you are ruining your children's life by giving them free stuff.
3. To have someone to care for me when I am old. Well, that is really selfish.
4. To continue the human population. Well, there are more than 7 billion people to do it.
The real reason to raise a family appears to be personal and societal growth. The roles people play change them deeply. We know that from the work of Phillip Zimbardo (Spielman et al, 2014, p. 413-414). It is the role of parents that society needs the most. When a young man becomes a father, a lot of things change. He knows he has to be a good role model for his children. Suddenly, the bikini-clad model on the billboard concerns him, even though he used to enjoy looking at her. Suddenly, cussing and drinking sound like bad ideas to him. He wants television programs to be free of sexual and political references. He wants society to be free of crimes. He cares about the education system more than he did when he was in school. The role fundamentally changes him. The same can be said about his wife. Singles have nothing invested in society. Parents, however, have everything to lose if society becomes immoral. Children give parents the reason to grow up, yet it is the parents raising the children.
There is something to be said about Vegeta in Dragon Ball Z & Super. Having a son made him responsible. Having a daughter in Super made him more responsible. He rejected a chance to train with Beerus and Whis when Bulla was about to be born. This is unexpected from the old Vegeta, who was not only irresponsible but also reckless. His family became the reason for him to be responsible.
It doesn't necessarily mean that people must raise children to grow up. They can adopt without getting married if they want to take responsibility. Some can develop virtues without going through the normal path. For most, however, it may be a reasonable course of action that develops them and eventually society through them.
Spielman, R. M. et al. (2014). Psychology [Oct 02, 2019]. Retrieved June 20, 2020,