For most of us, having a baby is the most profound, intense, and fascinating experience of our lives. Now scientists and philosophers are starting to appreciate babies, too.

The last decade has witnessed a revolution in our understanding of infants and young children. Scientists used to believe that babies were irrational, and that their thinking and experience were limited. Recently, they have discovered that babies learn more, create more, care more, and experience more than we could ever have imagined. And there is good reason to believe that babies are actually cleverer, more thoughtful, and even more conscious than adults.