Kenny shows how the spread of cheap technologies, such as vaccines and bed nets, and ideas, such as political rights, has transformed the world. He also shows that by understanding this transformation, we can make the world an even better place to live.
That's not to say that life is grand for everyone, or that we don't have a long way to go. But improvements have spread far, and, according to Kenny, they can spread even further.
REF : 9780465032884