Heather Gorsett’s Reviews > The Landmark Thucydides: A Comprehensive Guide to the Peloponnesian War > Status Update

Book I lays out the start of the Peloponnesian War between Athens and Sparta and explains why it mattered so much. Thucydides doesn’t jump straight into the fighting—instead, he takes time to set up the historical and political background. While specific disputes triggered the conflict, the deeper cause of the Peloponnesian War was Athens’ growing power and the fear it inspired in Sparta.