There are 757million illiterate people in the world right now. And this is not a developing world problem: one in five children in the UK, or one in four in the US, leave primary school unable to read and write properly. Illiteracy is not a sexy or exciting topic. It's not confronting in its raw emotional power... People aren't directly dying or overtly suffering of illiteracy. As far as global issues go, it may feel a little vanilla. But when you look at the relationship between illiteracy and most other global issues, a statistical pattern emerges.