Last Sunday a small group of intrepid walkers, some from La Sapienza where I teach, joined me in commemorating the great urban thinker Jane Jacobs by exploring Rome’s Tiburtino and Nomentana neighborhoods. I had designed a similar walk years ago as part of a series I dubbed “ecological itineraries.” The idea, in keeping with the mission of the annual world-wide Jane’s Walks events, is to walk the city as an act of …