This has been pushed by just about every major academic outlet since the late 90s. The volume intensified in 2010 and there's been a dozen documentaries and dramatizations showing "what would happen".

What's unfortunate is these models aren't always accurate, and assume certain patterns persist for 100s of years.

However, to become depressed to the point of apathy is the wrong way to see this. It's what happens when you attempt to comprehend thousands of years in a scale they cannot possible act on themselves.