He received his early education in Switzerland and Germany, and later at Trinity College, Dublin, where he held the professorship of ancient history. Mahaffy, a man of great versatility, published numerous works, some of which, especially those dealing with what may be called the Silver age of Greece, became standard authorities.
The following deserve mention: History of Classical Greek Literature (4th ed., 1903 seq.); Social Life in Greece from Homer to Menander (4th ed., 1903); The Silver Age of the Greek World (1906); The Empire of the Ptolemies (1896); Greek Life and Thought from Alexander to the Roman Conquest (2nd ed., 1896); The Greek World under Roman Sway from Polybius to Plutarch (1890).
His translation of Kuno Fischer's Commentary on Kant (1866) and his own exhaustive analysis, with elucidations, of Kant's critical philosophy are of great value. He also edited the Petrie papyri in the Cunningham Memoirs (vols. 1891—1905).
This entry was originally from the 1911 Encyclopedia Britannica.