Some stuff is evolutionary. Co-sleeping is seen in all mammal species. And its an important part of the group sentiment, including the social support it brings. The lack of it causes anxiety in mammal species. Even domestic cats prefer to take care of their young in groups of mothers until the kittens grow up.
> This kid cried every time a fart came. At some point you just need to learn...
...that those farts have been causing pain in his abdomen or scrotum. Its amazing how it did not occur to you and instead you let the kid to just 'go through' it.
> England and France in the 1780s for instance it was extraordinarily common to simply ship your baby out to the country so you could work or maintain your aristocratic figure
Inbreeding, negligent and sociopathic aristocrats are never good examples for anything related to the basic tenets of human civilization. Less, parenting. Sheeesh. If your parenting morning star is murderous 18th century aristocrats who starved their people to be able to live in extravaganza with their powdered wigs...