You have to concede that the "Church." either in the Calvinist or the Catholic sense of the word, wrote the New Testament. It is now clear that unbelievers recongized that the authority of the Church depends on the Bible, that if they can discredit the Scriptures, they can discredit the Church. But that goes both ways. The Bible, at least the New Testament, consists of what traditional Christianity-- Latin or Eastern--says it is. The modern gnostics are trying to persuade the public that the "lost gospels" are as authenetic, or more so than the canonized gospels, They claim that they were suppressed after Constantine adopted Chrstianity as the State religion. Assuming that Constantine did adopted Christianity to butress his political position, one must also accept that he would have chosen the most powerful Christian factions, namely the Catholics. Certainly, this was no inconsiderable number. We have only to look at the number of bishops at Nicaea to see how numerous the Catholics were. Even without the power of the State behind them, even with the power of the State opposed to them, they have prevailed over their rivals.
I draw pretty sharp distinctions on this topic, so yes, men of the "Church", penned the words and ideas. I just hold that those ideas came directly from God. In my mind there is way too much cohesiveness in the NT for the books to have been written independently, rather than under a divine inspiration.
It is now clear that unbelievers recognized that the authority of the Church depends on the Bible, that if they can discredit the Scriptures, they can discredit the Church.
That sounds reasonable.
The modern gnostics are trying to persuade the public that the "lost gospels" are as authentic, or more so than the canonized gospels, They claim that they were suppressed after Constantine adopted Christianity as the State religion.
The Gnostics would have to explain what they think the Spirit's role was in assembling the NT. They would have to say "none". If I am following your overall point, though, I would certainly agree that Catholicism was the dominant faith within Christianity at the time, and always has been in terms of numbers (as far as I know).