I have also been considering all the people who are connected to these adoptees without knowing so. For example, think of the people who are walking around in the world today assuming that they have no connection to adoption, when in actuality they have an unknown sibling who was placed and kept secret.
Are you someone who is into genealogy? Are you confident that you have traced your genetic line back hundreds of years? Think again. All it takes is one adoptee—one person who was publicly acknowledged as a child and heir though not genetically so—to throw the whole thing off. And given that adoptions in the past were often hidden, there's a pretty good chance you've got such an adoptee in there somewhere.
My daughter Ashley and I were recently watching the third movie in the Chronicles of Narnia series. In it, one of the characters discovers and uses a "spell to make the unseen seen." Can you imagine what the world would be like if we had such a spell for adoption? What would we see if all of the invisible adoptees were suddenly made visible?