I like what astrologer Rick Levine said about the subject:

"It's interesting to me that Pluto (Latin for Greek Hades, for English Hell) represents all that is shadow, that which is excluded. Reality and symbolic archetype is so entwined. We have banished Pluto to where he naturally belongs: the netherworlds of unplanets. We had our chance to integrate him, but we chickened out. And of course, by suppressing his natural planetary expression, we have inadvertently given him additional power. That which we resist will persist even stronger. "


Which brings to mind the words of Emile Zola:

""If you shut up truth and bury it under the ground, it will but grow, and gather to itself such explosive power that the day it bursts through it will blow up everything in its way.""

Pluto is not a part of Classical astrology, having been discovered in the 1930's. Some claim that the ancient rishis of the Vedic tradition knew about the distant planets beyond Saturn, but did not see them as essential for predicting the impact of astrology on Earth.

David

Pluto is not very classical or even classy since it purposely avoids Pisces and Aries. It nevertheless enters Eridanus, Orion, Bootes and many other constellations.