That seems to be the problem with all these experts. 5 years from now everyone will have changed their mind.

Take for example Dr. Spock.

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 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.

Years later though many expounded claims that Dr. Spock advocated permissiveness.

Some have seen Spock as the leader in the move toward more permissive parenting in general, and have blamed him for what they saw as the negative results. Norman Vincent Peale claimed in the late 1960's that "the U.S. was paying the price of two generations that followed the Dr. Spock baby plan of instant gratification of needs."[1] Vice President Spiro Agnew denounced him as the "father of permissiveness," claiming that Dr. Spock's child rearing principles encouraged lawlessness among young people in the 1960s. Spock's supporters believed that these criticisms betrayed an ignorance of what Spock had actually written, and/or a political bias against Spock's left-wing political activities. Spock himself, in his autobiography, pointed out that he had never advocated permissiveness; also, that the attacks and claims that he had ruined American youth only arose after his public opposition to the Vietnam war. He regarded these claims as ad hominem attacks, whose political motivation and nature was clear.

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"What you hear in a great jazz band is the sound of democracy. “The jazz band works best when participation is shaped by intelligent communication.”
Harmony happens whenever different parts get to form a whole by means of congruity, concord, symetry, consistency, conformity, correspondence, agreement, accord, unity, consonance…….