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Bill Gates to give away 99% of his wealth in the next 20 years
(www.gatesnotes.com)
This is a most excellent place for technology news and articles.
It's not really about lowering birth rates directly it's about removing the perceived need for higher birth rates.
There are quite a lot of studies that show that even in countries where infant mortality is now manageable it still takes several generations before that trickles down to the population and they stop having 15 kids as standard. Also lack of sexual education doesn't help.