With more and more people talking about “the left cannibalizing itself” and “liberals eating their own,” or how “democrats need to unite to defeat Trump,” we need to keep reminding ourselves and others about the problem of progressivism — instead of just beating the dead horse that is the problems within progressivism.

I’ll start with the second one, because that’s what everyone won’t stop yelling about, and I’m afraid if I don’t do a little yelling you won’t hear me out on the part of this t...