I don't know about "white guilt," but Europeans and their descendants are responsible for most of the world's problems.
We're not talking about prehistory, or a thousand years ago. What part of "most of the problems" is the difficulty, here?
Well, I'm not going to speak for
@Nyotarules, but for myself "most" is an issue, and hand-in-hand with that it is an issue how to enumerate the problems and assign them weight, not to mention how to assign responsibility.
For example, we could say that gunpowder is a direct cause or otherwise an underlying cause in many serious problems in the world, but that sure as heck wasn't discovered by Europeans. Cutting off discussion of gunpowder because it was discovered over a thousand years ago seems pretty arbitrary, given how important a factor guns are in the world's problems today, not just domestically in the US in terms of gun control but around the world in terms of war.
Or, less remotely and operating within your time horizon, we could observe that most people on the planet live in sovereign states that aren't European and, even if they are former European colonies in whole or part, whose populations aren't dominated by European descendants. Do we count problems by counting hungry mouths? By counting people who live in war zones? Abnormally unsafe areas? Etc. Is something a European problem because Europeans haven't solved it, even if it is taking place in a non-European country? Or are you saying that Europeans and their descendants are pulling most of the strings around the world, and so own the lion's share of the blame?
Europeans and their descendants have certainly played a major role in fucking things up, I'm not arguing against that, and IMO Americans probably share a disproportionate responsibility for the state of the world today. But yeah, the issue would be what's meant by "most" and the can of worms there.
Not mention, how to assign responsibility for so-called blame to people who weren't even alive when the sins were committed.
as a segment of humanity which has held such disproportionate power for so long a commensurately large portion of that damage has certainly been our doing
Yes, but I hope you can see that there's a difference between holding a disproportionately large share of blame, or responsibility if you prefer, and holding most of it.
I'm not saying that Europeans and their descendants (i.e. chiefly whites in the good ol' USA)
don't hold most of the blame or responsibility either. What I am saying is that there are quite a lot of undefined terms flying around here.