A systematic history of Stoic philosophy emphasizing its evolution under Roman influence, surveying its Greek roots, doctrinal divisions, and major themes: logic, physics, and ethics. The author traces the spread of Stoic teaching into Rome, explains its practical moral precepts—virtue, duty, self-control—and examines notions of the soul, providence, law, and religion. Chapters treat philosophical method, cosmology, moral psychology, and daily conduct, and conclude by assessing Stoic contributions to Roman literature and their echoes in emerging Christian thought. The presentation combines textual evidence, fragmentary sources, and interpretive commentary for students of classics and philosophy.