So much negativity in the comments here on the subtopic on "what caused the evolution". Yes, we know that nobody really knows, the author doesn't really know ei

So much negativity in the comments here on the subtopic on "what caused the evolution". Yes, we know that nobody really knows, the author doesn't really know either. What the post conceptually centers on is best depicted in that chart in the middle. Also, if you read the entire thing you'd have found out that the author isn't trying to make any specific point, but rather is telling a story.