I thought I addressed perspective in my post. In addition often all you have to do to change your perspective is go to another continent. There's also an eleme

I thought I addressed perspective in my post. In addition often all you have to do to change your perspective is go to another continent. There's also an element of survivorship bias. The Antikythera Mechanism, while not a book, is amazing, yet it and devices like it and its instruction manual didn't survive through the ages. Many books on the minutiae of the regiments and classification of angels did.