Twice a week, I babysit my granddaughter, who is quite certain that she is the center of the universe. Until last month, she could sleep between her mother and father and say simply, “Some” and a nipple would be placed in her mouth. She will remain the center of the universe at least for awhile—maybe until a sibling joins her. And then—disruption! Disruption to all assumptions, disruption to all days, disruption to her own disruptions. She will eventually join other... Read more