
I read this recently on Dr. Sears website about babywearing:
Have you ever wondered why mothers in other cultures have for centuries worn their babies in homemade slings? I used to believe this old custom's purpose was simply to protect babies from jungle dangers or to enable mothers to do manual labor. Wrong! When I was researching parenting styles in other cultures, I interviewed African mothers who wore their babies in slings that were extensions of their clothing. They agreed that babywearing protected their infants from dangers, but that wasn't the main reason for doing it. Instead, they said, "It makes life easier for the mother," or "It does good things for babies." What good things? I inquired. These mothers replied, "The babies seem happier," or "They cry less," or "They seem more content," or "The babies grow better."
Babies worn in pouch slings are indeed happier and thus spend more time in a quiet alert stage - the behavioral state when babies interact and then learn from their environment.


