Who is Eris from Goddesses in Everywoman: A New Psychology of Women and what is their importance?

Eris is briefly mentioned when the author shows her readers how to integrate multiple goddess archetypes into their sense of self. One side effect of difference can be discord: this is goddess Eris's home turf, as she effectively instigated a great deal of competitive strife amongst three of the goddesses after having been ignored and left without a wedding invitation. She was reduced to going as an uninvited guest and stirred up trouble, though she did not attack anyone. Instead, she sowed strife from real forces that lurked just under the surface of the dynamics between other goddesses.