We step into a house with a newborn like we’re stepping into a bubble, in breathless wonder. Babies are so easy to welcome. So disarming, so nonthreatening. So unifying, because we all started out like that—as a trembling, mewling newborn. Utterly, almost frighteningly, dependent.All of us: President Obama. The artist/athlete/superstar you like. That guy from Duck Dynasty.  The person who drives you nuts. At the start we’re the same,  same, same. Human. Only a human gets another human. My dog doesn’t totally get me. My Christmas tree doesn’t get me, neither do the glorious stars or a sunset or the birds flying overhead. Only humanity can empathize with humanity. And…