Who is often referred to as "the father of modern astrology"?

Alan Leo, born William Frederick Allan, (Westminister, 7 August 1860 - Bude, 30 August 1917), was a prominent British astrologer, author, publisher, astrological data collector and theosophist. He is often referred to as "the father of modern astrology". He simplified and popularised the technical aspect of astrology, making it easier for everyone to understand. His works revitalised astrology in the Western world after its decline in the 17th century.

Alan Leo opened up the secrets of divination by the stars to the general public in the 20th century with a popular line of astrology manuals that set the craze for horoscopes that continues to this day. In his manuals and books, he teaches us - the basics of astronomy, the nature and character of the twelve signs of the Zodiac, the complete breakdowns of the effect of the Sun and the moon on each of the Zodiac house. Leo was a devout theosophist and he worked many of its religious concepts such as Karma and reincarnation into his astrology.

Towards the end of life, in 1909, and again in 1911, Leo travelled to India to understand Indian astrology. He later incorporated portions of Indian astrology into western astrological model. Leo's book "The Art of Synthesis" (1912), gave the planets description such as "Mars the Energiser". In 1915, Leo founded the "Astrological Lodge of the Theosophical Society" in London. His principal works include "Astrology for All", "Casting the Horoscope", "Horary Astrology", and many others.