Breastfeeding and population size

Interesting article on the numerous positive effects of breast feeding, including comments about how it can affect population size.  I don't agree with all the conclusions, but I do find some of the negative effects of not breastfeeding to be noteworthy from the article, including things such as "lower IQ, poorer eyesight, more infections, higher risk of requiring orthodontics, higher risk of eczema and asthma and higher cholesterol, and they are more likely to be overweight and to develop diabetes"