English to Spanish Social Sciences Social Science, Sociology, Ethics, etc.

Hi! I would like your help in finding a suitable translation for this phrase in the following context:

“The difficult heritage is concerned with histories and pasts that do not easily fit with self-identities of the groups of whose pasts or histories they are part. Instead of affirming positive self-images, they potentially disrupt them or may threaten to open up social differences and conflicts. Difficult heritage deals in unsettling histories rather than the kinds of heroic or progressive histories with which museums and heritage sites have more traditionally been associated.”

So far, the best I have managed is "herencias difíciles".

Thanks for your time!