Book excerpt: Searchable online reference covers more than 20 centuries of history, and interpret history broadly, covering areas such as archaeology, climate, culture, languages, immigration, migration, and emigration. Multi-authored entries analyze key themes such as national identity, women and society, living standards, and religious belief across the centuries in an authoritative yet approachable way. The A-Z entries are complemented by maps, genealogies, a glossary, a chronology, and an extensive guide to further reading.--From title screen.