> In fact, had the Ottomans just built proper toll roads, they may have held back the Reformation _and_ Renaissance for a 100 or so years.
Now sure I follow. The Reformation in my view was not an inevitable advancement but an unnecessary disastrous event (involving a good deal of looting by protestantizing princes lusting after Church property) that plunged Europe into disastrous religious wars. Why would toll roads have slowed the arrival of this revolt against the Church?
The Renaissance, pace the tidy myths we're taught in schools, was not some clean break from the Middle Ages or even a revolt, but a transition that was heavily indebted to the Middle Ages (actually, in terms of philosophy, it was kind of a mediocre period of history, save for perhaps some exceptions). Are you claiming that exploration was essential to the Renaissance? I'm not sure I buy that.
> I know in European and American histories the existence of the Ottoman Empire and it's impact is not considered when evaluating the external forces that were nudging societies one way or another,
I wouldn't generalize. Had the Ottomans conquered Vienna, it is argued that this breach through the Alps would have allowed the Ottomans to conquer the rest of Europe. Or at least tried to. That much is taught in some European countries.