In the future, very few will know what it is like to have a brother or a sister. Siblings will cease to exist, and every child will mostly be an only child.
I think having siblings has always been part of our culture’s history and environment.
This unravelling of human norms may affect the only child’s psychology to the point where society and human nature itself will be changed.
I don’t know...most of the “only” children I have known wanted more than one kid...it’s like they crave what they did not have.