Having some children:

Jordan Peterson:

"People grow up when they get married. It is probably better to get married when you are young because then you grow up. And then what else matures people? I have met very few people who have fully matured who do not have children. I think there is a reason for that, a real technical reason. You are not mature until someone else matters more than you—period. Maybe that will be your wife or your husband, but probably not. They might matter as much as you, and maybe that is the right amount. But when you have children, they matter more than you, unless there is something seriously wrong with you. Very few parents, if push came to shove, would not die for their children. As soon as someone else matters more than you do in some fundamental sense, you have taken another step toward a true, mature responsibility. I do not see that you can do that without necessity, and there is nothing that screams necessity more than an infant."