Alan Leo (1860-1917) is widely recognized as the father of modern Western astrology. He popularized astrology as a form of psychological guidance, self-development, and a system of predicting future events. He also wrote several books on astrology, which are still widely read today. Leo was born in England and was a member of the Theosophical Society, which was a major influence on his work. He is credited with introducing the use of the Tropical zodiac and the harmonics system of astrology. He is remembered for his work in astrology and his influence on the modern Western astrological tradition.