History is Philosophy teaching by example.

The saying frames history not as a mere chronicle of events but as a practical branch of moral and political reasoning: by observing what people and states actually did—and what followed—we learn how power, fear, ambition, and chance operate in human affairs. Read this way, “philosophy” means disciplined reflection on causes and consequences, while “example” means concrete cases that test ideas against reality. The maxim also implies a didactic purpose for historical writing: it should furnish patterns, warnings, and analogies that help later readers judge policy and character. Even if not authentically Thucydidean, it captures a common classical view of history as a teacher of prudence.