Consider the abstract,
As the works of dozens of women writers have been rescued from what E. P. Thompson calls “the enormous condescension of posterity,” and considered in relation to each other, the lost continent of the female tradition has risen like Atlantis from the sea of English literature.
Taken from -
Green,Sharon Weiner,M.A.; Wolf,Ira K.,Ph.D. (2015-02-01). GRE, 21st edition (Barron's Gre) (Kindle Locations 16724-16728). Barron's Educational Series. Kindle Edition.
I am unable to infer the meaning of what the author is trying to suggest with this line,
the enormous condescension of posterity
Words with their meaning-
condescension - an attitude of patronizing superiority; disdain.
posterity - all future generations of people.
Kindly elaborate. I know that the author uses a metaphor(comparision) -
the lost continent of the female tradition has risen like Atlantis