Robert A. Levy: Truth was an early victim in the battle against tobacco. The big lie, repeated ad nauseam in anti-tobacco circles, is that smoking causes more than 400,000 premature deaths each year in the United States. That mantra is the principal justification for all manner of tobacco regulations and legislation, not to mention lawsuits by dozens of states for Medicaid recovery, class actions by seventy-five to eighty union health funds, similar litigation by thirty-five Blue Cross plans, twenty-four class suits by smokers who are not yet ill, sixty class actions by allegedly ill smokers, five hundred suits for damages from secondhand smoke, and health-related litigation by twelve cities and counties - an explosion of adjudication never before experienced in this country or elsewhere.