Probably the most impressive things we experience nowadays when we watch period movies and TV series, like Mad Men, is not the vintage fashion or the dated technology. It is watching all those people smoke. We are living in a world that is rapidly parting with the smell of burning tobacco, and with the health risks it brings. Astonishingly, one of the agents of change is a tobacco company. Philip Morris International is now building a smoke-free future, says George Margonis.