Malaria kills 700,000 children every year. Gates' Foundation has made tremendous strides in a short time in treating and preventing the disease, and my guess is that we'll see a viable vaccine within our lifetimes. The impact of having that burden lifted from Africa is incalculable. It would be a huge gift to humanity in one of the world's most troubled corners. Just another example of a capitalist doing well and doing good (to borrow shamelessly from my friends at PERC).