Smokers die early. How is this 'truth' established? Like this. If, this year, the average life expectancy is 78 and you die at 77 and smoke(d), the year you are missing is ATTRIBUTED to smoking, never mind genetics or the other million every day things that could have made you live one year "less". However, if you live one year "more", that extra year is NOT attributed to smoking because the ideology says that smoking kills by definition - so it must have been something else that made you live a little longer, but CERTAINLY NOT smoking.
Be that as it may, the hard and empirical evidence (no epidemiological attributions needed) shows that the world's oldest are or have been all smokers. To avoid sending the "wrong message" (the "right" one being that "smoking kills"), these people are called "exception to the rule". But are they all exceptions to that rule, or is it just the rule that is flawed by ideology and beliefs?
http://www.forces.org/static_page/oldest.php so perhaps the anti smoking campaign is meant to reduce the social security benefits(non smokers don't live as long), and also as a justification to raise taxes on tobacco?.