Sibling relationships and 80 percent of

Sibling relationships – and 80 percent of Americans have at least one – outlast marriages, survive the death of parents, resurface after quarrels that would sink any friendship.  They flourish in a thousand incarnations of closeness and distance, warmth, loyalty and distrust.  ~Erica E. Goode, "The Secret World of Siblings," U.S. News & World Report, 10 January 1994