Benjamin McLane Spock (May 2, 1903 – March 15, 1998) was an American pediatrician whose book Baby and Child Care, published in 1946, is one of the best-sellers of all time. Its message to mothers is 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. However, they were also widely criticized by colleagues for relying too heavily on anecdotal evidence rather than serious academic research. 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 gratification 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.