Just Say No
Robert Cox and David Cantor made the slogan "Just Say No." They were advertising executives at Needham, Harper & Steers/USA in the early 1980s.  Nancy Reagan first used the phrase in 1984 when she visited Longfellow Elementary School in Oakland, California. A schoolgirl asked what she should do if her friends or classmates offered her drugs.  Soon "Just Say No" clubs became common within schools and anti-drug programs in schools. In these clubs, children promised not to use drugs.