Unless all five steps are in place, we can never control a health problem. This explains why we speak nowadays in halls where nobody is smoking; 50 years ago it was customary to smoke at public meetings and anywhere we liked on trains, buses, cinemas, even theatres. The custom of offering a cigarette as a token of friendship when introduced to strangers is as obsolete now as flicking a horse's rump with a buggy-whip[11]. Ashtrays are becoming collector's items.