Wow, lots of great information in this article. But I have to address one little bit:
“During the 20th century in America, feminism, aided in part by the convenience of formula, helped bring more women into the workforce. While this was a great thing for gender equality, it shifted focus away from breast milk, which meant that medical and governmental institutions turned away from it too.”
No. Women had been forced away from breast feeding at least two generations before this. It happened when childbirth and child rearing came under the “authority” of men, and sadly, under the science these men espoused. Efficiency was king, and emotions or human needs were a waste of time. With happy serendipity, this paradigm shift was accompanied by the industrial revolution and the wonder of factory-made food. One of the first foods was evaporated milk. So much better for your baby than whatever is coming out of your body, plus it saves you time! To go clean the stove!
By the 1950’s, breastfeeding was considered old-fashioned and nearly impossible to do anyway, given that most women were knocked unconscious for birth and remained groggy and addled for those crucial early days. Hardly anyone was doing it.
Source: The More I Learn About Breast Milk, the More Amazed I Am – Features – The Stranger
Marlene Dotterer 
My mother-in-law breast-fed her first three children, but went to formula for the last three. She didn’t care a fig about fashion, but having a large family put a strain on her and the convenience of formula was a huge benefit for her. If she had known what formula lacked, I’m sure she wouldn’t have used it but as it was she thought she was doing the best thing for her family.