[joebuck]

"It took the synods of the Catholic Church in the 4th Century to sort everything out."

Virtually every book of the NT was acknowledged as scripture by Irenaeus in the mid second century in his seminal work "Against Heresies"

[irishjuggler]

Of course, Irenaeus also considered certain non-canonical works (e.g., The Shepherd of Hermas and 1 Clement) to be scripture, so things were hardly settled by the time of Irenaeus.