A 5x3 card signed August 26th 1977 by Dr. Benjamin Spock (1903-1998), the American pediatrician whose book Baby and Child Care, published in 1946, is one of the biggest best-sellers of all time. Its revolutionary message to mothers was that "you know more than you think you do". Spock was the first pediatrician to study psychoanalysis to try to understand children's needs and family dynamics. His ideas about childcare influenced several generations of parents to be more flexible and affectionate with their children, and to treat them as individuals, whereas the previous conventional wisdom had been that child rearing should focus on building discipline, and that, e.g., babies should not be "spoiled" by picking them up when they cried.

In addition to his pediatric work, Spock was an activist in the New Left and anti Vietnam War movements during the 1960s and early 1970s. At the time his books were criticized by Vietnam War supporters for allegedly propagating permissiveness and an expectation of instant gratifications that led young people to join these movements, a charge Spock denied. Spock also won an Olympic gold medal in rowing in 1924 while attending Yale University.