Jonah Goldberg reminds why the slippery slope is so slippery - what's denied yesterday becomes today's project for change.
A deeper and more poisonous problem is the breakdown in trust. Again and again, progressives insist that their goals are reasonable and limited. Proponents of gay marriage insisted that they merely wanted the same rights to marry as everyone else. They mocked, scorned and belittled anyone who suggested that polygamy would be next on their agenda. Until they started winning. In 2013, a headline in Slate declared "Legalize Polygamy!" and a writer at the Economist editorialized, "And now on to polygamy." The Atlantic ran a fawning piece on Diana Adams and her quest for a polyamorous "alternative to marriage."