The argument that Gates apologists use is that by ensuring that babies will survive through the miracle of vaccines, women won't want to have to many kids.  They'll point to the more developed countries as evidence.

To be fair, this is not a totally bogus idea.  I don't buy it, though, in part because in my research I find the impacts of vaccines to be anything but a positive factor in raising a kid to productive adulthood (where they will, with luck, assist the parent in their old age.)  Being highly devastating to health, vaccines are great for prescription drug and adult diaper sales though.

Another reason I don't buy it is that Gates cannot hide his duping delight and his creepy smirk whenever he talks about how great vaccines are for the recipient and for the world.  Apparently Daddy Gates was head of planned parenthood so it seems that he came from a family of eugenicists (planned parenthood evolving straight out of the eugenics movement which was popular in pre-wwII America but lost it's luster when Nazi Germany implemented what they called 'the American Plan' to strengthen the strain.)