The entirely predictable (and predicted) mainstreaming of polyamory

As anybody should have been able to see even as long as ten years ago, the project of mainstreaming polyamory is well underway.  Since there can be no ground of principle for rejecting multiple sexual partner relationships once the historic idea of marriage as the conjugal union of husband and wife is jettisoned in favor of the idea of "marriage" as sexual-romantic companionship or domestic partnership, it was "in the cards" (as social conservatives have been pointing out and candid social liberals have been acknowledging for at least a decade). Here's a sympathetic story about British polyamorists from the BBC (a reliable voice of the social liberalism in Britain).

http://www.bbc.co.uk/news/magazine-23726120