I’m just skeptical that the aggregate tendency of young white Bobos, in America as in Europe, to have one or zero children doesn’t contain at least an element of solipsism. ~Ross Douthat 

Surely there are things, even inside this fantastic moral taxonomy, that men and women could do with their lives to compensate for their choice not to have children. Surely not all childless lives are deplorably solipsistic. ~Will Wilkinson

Indeed.  I wouldn’t say deplorably solipsistic–I wouldn’t use the word solipsistic, since this ascribes an epistemological error to what is really just an exercise in glorifying autonomy and practicing self-indulgence.  On the other hand, these childless folks could become monastics and then Ross would be in more of a pickle.