More than 1 billion people worldwide smoke cigarettes and, according to the World Health Organization, there will still be more than 1 billion in 2025. Some 40 million of them live in the United States. But progress toward the end we all desire—a world in which cigarette smoking is consigned to history—has been painfully slow. These smokers include your neighbors, your friends, maybe even your family. So how, practically, can we help this large population of existing cigarette smokers who’d otherwise continue smoking?