In the following sentence:
There has been a tendency among art historians not so much to revise as to eliminate the concept of the Renaissance - to contest not only its uniqueness, but its very existence.
How the tendency of not revising the work is related to not maintaining the uniqueness of the work?
If I don't revise or update my work, will that affect the uniqueness of my work?
I believe that, my consistency to do something unique affects the uniqueness of my work?
What is author actually trying to convey through the sentence?