It was not until the 1990s that manufacturers admitted any real harms caused by smoking. Part of this about-face was dictated by a change in legal strategy, which by this time had recentered around the argument that 'everyone has always known' that smoking is bad for you--so people have only themselves to blame for whatever diseases they contract from the habit.What a disappointment after this to come across Christopher Hitchens, opposing a ban on smoking in public places -- or keeping an end of the swimming pool for peeing in.
See also Chris Jordan's Running the Numbers
An American Self-Portrait (scroll down for image of 65,000 cigarettes, denoting the number of US teenagers who become addicted every month).