When I meet famous people in roller derby, I always try to ask them the same question about our sport: Why did it catch on and become so popular when it did? I’m particularly interested in why so many women took to the fledgling pastime and turned it into a movement, and why it became so meaningful in so many individual lives. I always get interesting answers. One derby coach I asked a couple years ago in the parking lot of a general store in Michigan, where I had traveled to attend her multi-day workshop, responded with a quote from the writer Victor Hugo: “You cannot resist an idea whose time had come.” I like this grandiloquent way of responding because it hints that the…