even movements that start out on the highest rungs tend to develop a dark shadow—a low-rung counterpart riding along in parallel, like two trains riding side by side. When the movement is in the early stages and on the way up, the distinction between the trains can be masked by the exhilaration of change. The question is what happens when that phase dies down and the two trains start to diverge on where they want the movement to go. It’s only a matter of time before most movements hit that fork in the road.
