8vo, brown cloth, black and gilt titles, 340pp. 1980 printing. Unpriced dust jacket mildly toned to rear panel and flaps. Contents clean, binding firm and square. The fourth volume by the philosopher of history in his monumental Order and History series, the Ecumenic Age refers to the dawn of the Persian empire through to the fall of the Roman Empire, exploring philosophical and religious consolidations of the age. A fine copy in mylar.