If you don't mind I still would like to feed on you a bit. Just to continue this, and see how this leads to a better result.
Perun said:
I claim that 90% of all art ever created is in the service of either political or, mostly, religious propaganda. I challenge you to name five world-famous pieces of art from the top of your head that are free from any religious or political connotation, not created in 19th to 20th century western Europe.
I challenge you to come up with some thorough research to back this up. I am seriously interested and look forward to the results. You're probably right about the majority of the works, but let's see how you'll get to 90%.
How many artists will you research?
How many artworks will you research?
How will you research?
What are your criteria for world-famous?
E.g., how many artworks are world-famous?
How will you
see if an artwork is created in the service of ...fill in... -propaganda?
Why not make a difference between:
-A: artwork that was paid by an important person (religious/political) and contains a propaganda message
-B: artwork that was paid by an important person (religious/political) and does not contain a propaganda message (you can't see that the artwork is used for propaganda)?
Why not make a difference between:
-A: a commissioner who was directly involved with the financing (or even executing) of (mass) killing
-B: a rich person who was less (direct) or not connected with the financing (or even executing) of (mass) killing
I'd like to do some research myself and see if I can come up with some examples of non-propaganda art, or art of a more difficult to define category.