This is a fine book by the two-time Pulitzer Prize winning naturalist Edward O Wilson.
This book is about the relationship between the humanities and the sciences and their roots in human creativity and what it means to be human. When did humans start being creative, well the answer is a lot longer ago than you think. The fields under investigation include palaeontology, anthropology, psychology, evolutionary biology, and neurobiology.
The book ends on such a positive note about scientists and scholars in the humanities serving as the leaders of a new philosophy which will become the Third Enlightenment, an enlightenment that will endure and allow people to understand that all people have a single country, the Earth, and a single home, the world. These final words come from a prayer for reason by Diogenes, which is still visible in its original form in Greece.