On the side of economics and government, the book is underdone. It is so, because ethnological knowledge on these topics is insufficient. It is difficult to say why. Possibly ethnologists have not become sufficiently interested or trained. But economic and political institutions are unquestionably difficult to learn about. They are the first to crumble on contact with Anglo-Saxon or Spanish civilization. So they lack the definiteness of ceremonialism, and their reconstruction from native memories is a bafflingly intricate task.