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:

Samuel Hartlib and the Hartlib Circle
38:04

Carlos Juan Finlay and Yellow Fever
41:40

SYMHC Classics: Deborah Sampson
37:33