Finally, a Detailed, Stepwise Proposal for a Major Evolutionary Change?

A reader asks about an essay by Nick Matzke on the evolution of the flagellum:

I just stumbled across a detailed proposal for the evolution of the bacterial flagellum by Nick Matzke. This is the first time I've seen any such stepwise proposal for a major evolutionary change. Most of it was written in 2004, and he conspicuously avoids you in his bibliography. I note that Matzke didn't get his PhD until 2012. I was wondering if any ID people ever responded.

Let me give a brief response. When th...