In view of the existing confused status of the surviving Greek papyrus and uncial MSS, the herein contained general reconstruction of the history of textual transmission seems not only justified but demanded. Only the continual process of manuscript comparison and cross-correction carried out over the centuries would have succeeded in "weeding out" the early scribal corruption and conflicting variant readings. The increased cross-cultural travel and communication which followed Constantine's formal act of tolerance and legitimization of Christianity would have had the natural effect of slowly purging from the manuscripts the conspicuous as well as the less obvious early adulterations. This course would have resulted in a truly "older" and purer text. Such a process would not have been possible unless the basic text of all the Greek manuscripts had been essentially "secure".
After the 9th century the production of most uncial MSS ceased and were systematically replaced by the miniscule style. These predominated until the invention of printing. This "copying revolution" resulted in the destruction of hundreds of previously-existing uncial MSS once they had been copied in cursive script.