Gates says in that video that the faster we improve health with vaccines, food, water, and education, the more poor countries control their population growth issues. How does that "sound like China's one child policy?" I didn't hear him say governments should control how many kids you have. We have veered off topic but it doesn't sound like you watched the video.      That's an overstatement of my and Trump's position, and to clarify: I think we need to track people to get our e