Book excerpt: Darwin's Bridge: Uniting the Humanities and Sciences explores the meaning of consilience and considers the unity of human evolution, human nature, social dynamics, art, and narrative. Bringing together cutting-edge scientists and scholars across a range of fields of knowledge production, this volume makes it possible to see how far we have come toward unifying knowledge about the human species, what major issues are still in contention, and what areas of research are likely to produce further progress.