It's averages over a long period of time. Like any other long term average, there is no one answer - many different types of patterns, etc contribute.
But in general, more troughing is the answer for more precip when looking at that kind of sample size. It's not uber complicated.
They also collapse, Tim.
You can only stress a society so far before something snaps. Whether it's the upcoming debt bomb, or the border situation, or global de-dollarization, we're looking at a future that requires a course correction on this country's part to continue the success we've experienced since the founding.
You can disagree with what kind of course correction there needs to be, but to ignore that there needs to be one in of itself speaks volumes.