Thanks! Cuneiform started as recordkeeping and accounting, its use in economic planning (micro and macro) became obvious; the surviving chronicles (the Babylonian Chronicle and the Synchronistic Chronicle) were compiled from earlier sources now lost; and the Epic of Gilgamesh and precious little else literary also is extremely old.
Now they're back.
The Hungarians had a theory that the early Sumerian materials were easier for them to work with and translate because the Hungarian language itself, in the belly of it's multi-language creole, had the makings of a cognate language.
Long after the Hungarian efforts it was found that right up to the early 1800s a Sa'ami language was spoken up in the Carpathian mountains. That "factoid" has just recently started showing up on the internet.
Sa'ami language researchers have proposed that the Sa'ami languages are, in fact, the cognate languages to early Sumerian. Going beyond that they believe Sumerian is, itself, a Dravidian language ~ much like those in Eastern and Southern India today (or all of India some 4,000 years ago).
It is entirely possible that pre 300 AD Hungarian may be a clearer link between Sa'ami and Sumerian.
If the researchers can prove their links, they can then begin incorportaing the Kola Peninsula petroglyphs into the theory of how writing was invented.