Some major world cities will ban cars on Monday to highlight the damage caused by our love affair with the automobile. It is, for one avowed non-motorist, a glimpse of God’s default setting of the human pace I  have never driven a car. Naturally I blame Margaret Thatcher. I was just at the “time to learn to drive” age when she uttered her infamous diktat: “If a man finds himself on a bus at the age of 26 then he can count himself a failure.” Like any other self-respecting teenager, I decided to do the opposite of what politicians told me.The politicians, as if to make my future life as difficult as possible, proceeded to ­dismantle as much public transport as they could, and pursue instead the largest road-building plan ever known since the Romans a