Polyamory gained a degree of cultural vogue in the sexual revolution of the 1970s, when books like "Open Marriage" made best-seller lists and swingers capitalized on the concept to justify experimentation. But while it failed to survive the era of fern bars for the mainstream population, a small but vocal collection of adherents -- many borrowing the language of inclusion used in the gay rights movement -- argues that polyamory can be a workable, responsible way to live.
