I pin it down to historical happenstance: Had the byzantines not
sent over a smart dude to re-educate the Latin West at the
otherwise doomed council of Florence, all Europe would have is
Aristotle when Byzantium (the carrier of Classical Greek
tradition and knowledge) fell... Best two paragraphs - out of
the Council of Florence page on Wikipedia: === The struggle for
East-West union at Ferrara and Florence, while promising, never
bore fruit. While progress toward union in the East continued to
be made in the following decades, all hopes for a proximate
reconciliation were dashed with the fall of Constantinople in
1453. Perhaps the council's most important historical legacy was
the lectures on Greek classical literature given in Florence by
many of the delegates from Constantinople, including the
renowned Neoplatonist Gemistus Pletho. These greatly helped the
progress of Renaissance humanism.[10]"