Hi
Now that we are waddling rather than walking around...(Yes I know turkeys
gobble and ducks waddle)
The December 1995 issue of Natural History magazine has an excellent
special section called "Natural Born Mothers"  It is very positive on
breastfeeding, even though the focus is not only human
breastfeeding.  The articles are interesting, not very technical and give
much food for thought.
Articles-
Natural -born Mothers
Hormonal Cocktails for Two
Milk:  It Does a Baby Good (about species specific milk)
Prenatal Power Plays
Liquid Assests:  A Brief History of Wet Nursing