Child Corporal Punishment Laws
Banning child corporal punishment legally is "The forgotten Peace Formula".
You can get a first overview on this Wikipedia article: https://en.wikipedia.org/wiki/Child_corporal_punishment_laws .
A more detailed report is available at www.endcorporalpunishment.org - find the updated list (February 2021) here:
child-corporal-punishment-laws-2021.pdf