Kirk wrote:

Since we need to keep an open mind and might do well to check all the possibilities . . . Pythagorean philosophy is a foundational influence of Hellenistic astrology.

Kirk wrote:
Aren't we saying the same thing, my 'a' indicating that there were others? Thank you for naming other influences, but you forgot the Chaldean.

I didn't forget Chaldean. I was picking up the word

philosophy

There seems to be these three main hellenistic philosophical streams involved in early Greek astrology. Its unclear what philosophical legacy (as opposed to astrological legacy) Mesopotamia contributed to the foundation of Hellenistic astrology.