People who know their biological parents and grandparents typically take the information for granted. Some have a difficult time empathizing with the passionate genealogical quests of adoptees and, increasingly, products of anonymous sperm banks and other new technologies where one or both genetic contributors are unknown. In recent years, new legislation has enabled people to search for information about genetic progenitors - even in cases where there had been a signed agreement of nondisclosure. The laserlike focus of that search can be as relentless as Ahab's hunt for the white whale.
Mystery of lineage is the stuff of great literature. Mark Twain made use of it for biting social commentary in his Pudd'nhead Wilson, a story about the mix-up of babies born to a slave and a free person. Sophocles, Shakespeare, Molière, and Dickens built grand tragedy and enduring comedy on the theme. In England in 2002, a white Englishwoman gave birth to mixed-race twins after a mix-up at an in vitro fertilization clinic. Imagine what Shakespeare would have done with that!
If one person's passions can be so riled...