For centuries in the West the genetic/biological description of family has been highly correlated with Western religious and political views of family. Each person has one sperm-supplying parent, and one egg-supplying parent, i.e., two parents of opposite sexes: exactly the type of couple able to marry in mainstream Judeo-Christian churches; and exactly the type of couple defined legally at the U.S.
But is this the only definition of “kinship”? A recent author notes:
