Elsewhere, however, it is the opposite archaeological evidence but few textual accounts. A veil of darkness descends over an era of widespread chaos and warfare. By the time that era had ended, most of the cities of the ancient world had been razed to the ground. Prior to 2000 BC, the Sumerians wrote down everything, even the most trivial day-to-day events. However, in the period 2000-200 BC, few records were made, and even fewer survived.

There is a problem with dates of alphabets here,if I may say so.The time period of 11th-10th ce.BC Homer wrote his masterpieces Iliad and Odyssey.Whatever we want to say about the oral tradition the language of these two works is complex with a grammar and syntax that only a mature worked through language could have possessed.There is no way one could have developed a text of that literary value without having an alphabet first.I believe that Greeks had an alphabet long before the 11th-10th ce.BC and not on the 8th ce. BC as your article above suggests.On the other hand ,according to Evans ,the Minoan civilisation, next door to the Phoenicians, was an advanced society with architecture arts and sciences 4000 BC.
Some further research may be needed on this area.