They weren't restricted in the Byzantine empire nor among their
  nearest neighbors, the Muslim communities, who existed
  side-by-side. Skirmishes and grabs for political power, yes. But
  nevertheless, similar education was available. How do you think
  the texts survived? Did Gemistus Pletho hold a crumbling set of
  800 year old texts that barely survived all of those centuries?
  No. The Greeks - both in the pre and post Christian eras, were
  excellent archivists and strict at copying precisely. You know
  the term Status Quo? They made an art out of Status Quo: Keeping
  things stable. Western Europe was DEFINITELY worse for lacking
  the documents. Why didn't Western Europe have them? I don't
  know. My historical interest is more on the Eastern Roman
  Empire, not the crumbling West. They were the backwards cousin
  of the Byzantine empire since the fall of Rome and started going
  their own way after a while. I don't put them in the same class
  as the East. Blame religion as you like but I see a Papacy as
  simple Kingship. No one to answer to. In the East, they had to
  answer to each other. Council of Churches. If you go off your
  own way, well, you're excommunicated. Out. No money. No people.
  No supplies. Not wanted anymore. Rome WANTED back in to the rest
  of the Church but their own way. The East refused to let them
  back. Militarily, the East sucked though. No surprise that
  Constantniple fell. But religious-wise, they were stable and all
  those documents presented to Western scholars were not crumbling
  ancient texts from the 5th century AD. Even Wikipedia gets it
  right here: "the original Greek texts what had been preserved in
  the Eastern Roman Empire". Preserved means ongoing copying,
  fresh copies made, knowledge transmitted successfully for
  hundreds of years, while the West suffered with squat. "Direct
  reception of Greek texts As knowledge of Greek declined in the
  west with the fall of the Western Roman Empire, so did knowledge
  of the Greek texts, many of which had remained without a Latin
  translation.[3] The fragile nature of papyrus, as a writing
  medium, meant that older texts not copied onto expensive
  parchment would eventually crumble and be lost. After the Fourth
  Crusade and the Sack of Constantinople, scholars such as William
  of Moerbeke gained access to the original Greek texts that had
  been preserved in the Eastern Roman Empire, and translated them
  directly into Latin.[4] There was a later stage when Western
  knowledge of Greek began to revive in Renaissance Humanism, and
  especially after the Fall of Constantinople when there was an
  influx of refugee Greek scholars in the Renaissance." == Notice
  the extreme biased telling of the story here. Emphasis on the
  ancient and crumbling and the lost. They nearly completely glide
  over the fact that the Eastern Empire kept them just fine. If
  you don't look carefully, you could miss it. == One you spot
  where they place most of the emphasis in this telling of the
  story, and once you spot what they're AVOIDING talking about...
  you can get a sense of the need to preserve the narrative of the
  Glory of Western Europe, Humanism... etc, as if they'd invented
  it entirely from fragments of scrap papyrus when that wasn't the
  case.