What kind of family is taboo for you? Not all families consist of a husband, wife, and their dependent children. At the roof of the world, where India meets Tibet, there is a 5,000-year old tradition known as polyandry-when a woman marries a man, she may also marry his brothers all at the same time.
In southwest China, Mosuo people are known as fanciers of free love, with no such thing as traditional marriage-or even a word for "father".
And in Capetown, South Africa, gangs that terrorize the streets through robbing, selling drugs and killing become surrogate families to young men from the ghetto.