"Breastfeeding promotes upward social mobility and protects against downward mobility. The effects appear to operate through enhanced neurological development and more effective stress processes."
This is top of my list of random breastfeeding research findings from 2012.
Which is quite related to this one:
"Results suggest links between breastfeeding and greater response to infant cues in brain regions implicated in maternal–infant bonding and empathy during the early postpartum. Such brain activations may facilitate greater maternal sensitivity as infants enter their social world"
and then the one nobody will believe:
"Breastfeeding may improve nocturnal sleep and reduce infantile colic."