Reply #157: Talk of "purity" makes me think of the Holocoust. Hiltler sought purity of race.

[L. Coyote]

Not everyone uses the word the same way, but generally it is in opposition to diversity.

Diversity is a huge asset, in my view. And the "big tent" empowers the progressives. If you are a faction in the majority, you have leverage, power, and a real voice in outcomes. Consider how coalitions function is other governments. Sometimes, a small party holds control of who forms the government! Progressives in the Big Tent can do the same, by deciding if they want to be in the minority -- read purist ethic -- or the majority -- read diversity ethic.