This book is the first international handbook of intelligence ever published. It is intended to prove a truly international perspective on the nature of intelligence. It covers intelligence theory, research, and practice from all over the globe. Areas covered include Great Britain, Australia, French-speaking countries, German-speaking countries, Spanish-speaking countries, India, Japan, Israel, Turkey, and China. Each author is an internationally recognized expert in the field of intelligence. Authors represent not just their own viewpoint, but rather, the full variety of viewpoints indigenous to the area about which they write. Each chapter deals with, for its area, definitions and theories of intelligence, history of research, current research, assessment techniques, and comparison across geographical areas. An integrative final chapter synthesizes the diverse international viewpoints.