Sense Book of Baby and Child Care was already selling a million copies each year. By the mid-1960s, however, book sales quickly slowed due to Spock's tarnished reputation after his publicized involvement in protests of the Vietnam War. Skepticism of his work increased, especially among colleagues, who criticized Spock for not being a serious academic researcher and relying too heavily on anecdotal evidence in his book. By the late 1960s, Spock faced widespread criticism for condoning an overly permissive parenting style. Many commentators blamed Spock for helping to create the counterculture of the 1960s. Critics believed the current youth were rebellious and defiant in part because they had been brought up by Baby and Child Care. Spock, however, continued to defend himself, saying he had always believed in firm leadership by parents. In the 1970s, with the rise of the women's liberation movement, feminists began to publicly criticize Spock for the sexist philosophy apparent in his book. Spock was thus forced to confront his own ideas about gender roles and gender stereotyping. Near the end of his life, Spock's changing ideas were reflected alongside technological and social changes in the seventh and final edition of his book. His advocacy for a vegan diet drew criticism from some nutritionists and pediatricians, including co-author Dr. Steven J. Parker, as being too extreme. Health and science columnist Jane Brody referenced the Pediatric Nutrition Handbook of the AAP in arguing that a vegan diet for young children could result in nutritional deficiencies unless carefully planned, something which would be difficult for working parents. Legacy Baby and Child Care popularized new ideas about child care in the years following World War II, encouraging flexibility, common sense, affection, and Freudian philosophy. Spock's reassuring advice gave parents the confidence to use their best judgment to raise their children. Spock also masked Freudian explanations of children's behavior in plainspoken language to avoid offending his readers, making Freud accessible to mainstream America. In 1959, Look magazine praised Spock, noting that "perhaps no other person has so influenced an entire nation's ideas about babies ... His views have brought naturalness, common sense, reassurance, Sigmund Freud and even joy to parents all over the world". Spock's optimistic book reflects the hopefulness of the post-war period and society's focus on children. Because post-war affluence helped parents give children more opportunities, parents became more concerned with providing the best for their children. At