The only fault with Marston's idea is that he thought it could be universally applied to everyone, everywhere (as in, all anyone, regardless of temperment or circumstances, needed to be happy was to submit to loving authority). It never bodes well for a theory on human behavior when its creator thinks it universally true.
Marston felt there were no strong role models for girls.
Writing in The American Scholar, in 1938 he discussed the negative effects of gender stereotyping in popular culture: “Not even girls want to be girls so long as our feminine archetype lacks force, strength, and power…. Women’s strong qualities have become despised because of their weakness. The obvious remedy is to create a character with all the strength of Superman plus all the allure of a good and beautiful woman.”
Interview with writer-director Angela Robinson
. She says that the timing of the film was not intentional.
edited 19th Sep '17 1:15:42 AM by AnotherGuy
I wonder if the film will examine some of Marston's more questionable ideas about gender; I mean, he felt that men were for instance inherently morally inferior to women, which was why they should subject themselves to women's "loving authority." He wasn't really touting equality, but female superiority.
Well, I have heard an early review mention there are some parts of him that are negatively but sympathetically portrayed. He comes off as someone who is sexist like nearly all other men in his time, but is aware he's sexist and wants to "de-program" himself, though that's tricky to do from within one's own mind.

This film is cunningly timed. A few months after Wonder Woman, this film focuses on William Marston and his poly-amorous relationship with his wife and a third woman.
It's more about unconventional love than comic books, but hopefully it'll deal with just who Marston was (they have his line about happiness submitting to loving authrority.)