The green Sahara was gone 5 000 years ago when Egypt barely started being Egypt and long before Assyria, the Bronze Age Collapse happened 3 200 years ago, and the Old Testament started getting written a bit before 600 BCE over a few hundred years. The Egyptians and Assyrians already had their breadbasket, it was the fertile crescent from the Nile to the Tigris and Euphrates, it was not a desert there.
The israelite texts survived because they were written right when some big empires (Babylon and the Achaemenids) came around and then carried them over until the Greeks and Romans came by.
The green Sahara was gone 5 000 years ago when Egypt barely started being Egypt and long before Assyria, the Bronze Age Collapse happened 3 200 years ago, and the Old Testament started getting written a bit before 600 BCE over a few hundred years. The Egyptians and Assyrians already had their breadbasket, it was the fertile crescent from the Nile to the Tigris and Euphrates, it was not a desert there.
The israelite texts survived because they were written right when some big empires (Babylon and the Achaemenids) came around and then carried them over until the Greeks and Romans came by.