Who actually did it, and when?
“Who had the authority to set the table of contents (canon) of the New Testament?
Who actually did it, and when? “
1. God
2. God
3. Eternity past.
The issue is that of "authority" and what it means. Westminster affirms, "it belongeth to synods and councils, ministerially to determine controversies of faith," and general obedience to such is enjoined and even to secular powers one finds themselves under. Rome could enjoin submission to her rule for those under her (the EOs, for one, did not recognize her rule), but the issue is whether her claim to authority over all the church is valid, which it is not, and that she possesses (conditional) ensured perpetual magisterial infallibility, which is a unScriptural novelty.
As for when, in reality the establishment of both men and writings of God was progressively realized, and essentially due to their unique heavenly qualities and attestation. And while Rome claims the power to infallibly settle the canon, yet she actually did not infallibly/indisputably settle her canon until approx. 1400+ years after the last book was penned, and after the death of Luther, and thus scholarly debate could and did continue right into Trent.
But why not state your actual argument, which i presume is that being the instruments, discerners and stewards of holy Writ means such are the infallible interpreters of it, and thus the validity dissent is disallowed?
Or in any case, are you arguing that if we accept that Rome settled the canon then that logically means we must accept all else that she likewise officially states? If that is not your argument, than of what weight does the basic oft-parroted polemical statement, "we gave you the Bible" have? Maybe you can ask whoever gave you this argument.