There seems to be a trait within the human ego that propels people to muck-rake over past growth for tiny stones rather than plant something new. Rather than achieve something themselves, they find an easier route in life wrecking the achievements of others. We see it everywhere, but in the arts especially.

I can see that to a point it helps us progress as a species - Those who do not remember their past are condemned to repeat their mistakes etc - but so often, it merely seems to be inadequate people attempting to make themselves seem cleverer, or more important, or "better" than those they are criticising.

It reminds me of the mediums threatening arch-sceptic Harry Houdini, that once he died he'd have no control over what words the mediums put into his mouth.