> no one in the world will literally care about the childless person. This is entirely dependent on the person. I think you're partially right that nobody will

> no one in the world will literally care about the childless person. This is entirely dependent on the person. I think you're partially right that nobody will care about you (as much) as your kids (potentially) will. If you spend your life focusing on yourself, then yeah, nobody will probably care about you. If you spend your life devoted to serving others and making an impact in your community then plenty of people will care about you when you're old. I've known many older people who have done great things for the community and the community gathers together to help them in return. You affect other people caring about you through your actions.