Thucydides
5th-century BC Athenian historian and general

Thucydides ( thew-SID-ih-deez; Ancient Greek: Θουκυδίδης, romanised: Thoukudídēs [tʰuːkydǐdɛːs]; c. 460 – c. 400 BC) was an Athenian historian and general. His History of the Peloponnesian War recounts the 5th century BC war between Sparta and Athens until the year 411 BC. Thucydides has been dubbed the father of "scientific history" by those who accept his claims to have applied strict standards of impartiality and evidence-gathering and analysis of cause and effect, without reference to intervention by the gods, as outlined in his introduction to his work.
Thucydides has been called the father of the school of political realism, which views the political behaviour of individuals and the subsequent outcomes of relations between states as ultimately mediated by, and constructed upon, fear and self-interest. His text is still studied at universities and military colleges worldwide. The Melian dialogue is regarded as a seminal text of international relations theory, while his version of Pericles's Funeral Oration is widely studied by political theorists, historians, and students of the classics. More generally, Thucydides developed an understanding of human nature to explain behaviour in such crises as plagues, massacres, and wars.
Life
In spite of his stature as a historian, modern historians know relatively little about Thucydides's life. The most reliable information comes from his own History of the Peloponnesian War, in which he mentions his nationality, paternity, and birthplace. Thucydides says that he fought in the war, contracted the plague, and was exiled by the democracy. He may have also been involved in quelling the Samian Revolt.
This brief starts where responsible research should: with the source description of “Thucydides” as 5th-century BC Athenian historian and general. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the people & ideas register because the source frames it as 5th-century BC Athenian historian and general. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Chronology provides the most reliable spine for this subject; interpretation should follow only after identities and dates are secure. The source revision retrieved here is dated Jun 23, 2026. The linked authority identifier is Q41683. VIAF identifies the subject as 95161463. The Library of Congress control number is n79021175. 2 of 20 selected statements include explicit references; 1 carry qualifiers and 0 use preferred rank.
Public reputation and documentary evidence do not always develop together; absence from a summary is not evidence of historical absence. The source lead contains qualifying language; that uncertainty should survive quotation, summary and reuse. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Read biographical claims against dates, named institutions and the cited references. Distinguish a subject’s later reputation from evidence produced during their lifetime.
- Establishing names and roles
- Building a first chronology
- Locating cited institutions
Personal papers, civil or court records, institutional files and the scholarship cited by the source.
Three-step research path
- Establish the record: confirm the title “Thucydides”, its source revision and the description used here.
- Expand the search: follow Thucydides primary sources, Thucydides archive and Thucydides research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “Thucydides”?
- Which claims depend on a single source or contested interpretation?
- Which primary records establish identity, chronology and institutional ties?
Search terms from this dossier
This entry incorporates text from “Thucydides” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.