I really don't see how it's possible for anybody to deny that generally speaking, going by all the usual metrics of societal health, more things are better for more people than they have ever been.
The problem is that some people who can't think very clearly point to the bad things that still exist - social inequality, disease, hunger, war and so forth - and think that this invalidates the point contained in the final dozen words of the paragraph above, and then somebody has to waste time explaining why this isn't so.