How many letters does the top answer for “author of theses on the philosophy of history” have?

The most common answer is benjamin (8 letters).

Crossword clue: author of theses on the philosophy of history

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

benjamin 8 letters wd-fact-v3

(Old Testament) the youngest and best-loved son of Jacob and Rachel and one of the twelve forebears of the tribes of Isr

author of a history of western philosophy 60% similar → russell

wrote theses on the philosophy of history 60% similar → benjamin