In 1916, the National Institution for Moral Instruction had a contest to see who could come up with the best morality code. For kids. Evolving views on childhood, child labor laws, patriotism, and eugenics influenced this effort.
Research:

Elizabeth Bisland, Beyond the Trip Around the World
42:54

SYMHC Classics: Marie Laurencin
32:46

Behind the Scenes Minis: Censorship Cats
26:59