Naive means having unaffected simplicity of nature
And the man and his wife were both naked and were not ashamed.(Genesis 2:25) ESV
The Naiveian was that blissful time of indeterminate length before Adam and Eve did anything stupid in the garden of Eden. They were naive. The climate was warm and equable.
Geological periods and epochs may be described as warm, mild, equable, uniform, temperate or tropical as a way to acknowledge the chain of causality involved in the deposition of fossils.
He attacked everything in life with a mixture of extraordinary genius and naive incompetence and it was often difficult to tell which was which.– Douglas Adams, The Hitchhiker’s Guide to the Galaxy