ByzCath:
Celibacy was not the norm from the beginning, it wasn’t even mandated for every priest in the Latin Church until the 4th century.
This work you speak of is one of those defenses that tries to raise clerical celibacy to the level of dogma.
It sounds to me that you are confusing the
de facto practice of priestly celibacy with the
de jure formalization of priestly celibacy.
According to my recent Church History course these are examples of
de jure formalization of celibacy:
“Pope Gregory the Great (d. 604) Reformed clergy along monastic lines; required priests to have some training; encouraged celibacy; encouraged work with poor.”
-and-
“Otto the Great, King of the East Franks (Germans), King/Emperor 963-973, Made bishops civil officials within his kingdom, Celibacy of bishops meant he did not have to worry about competing families to his own.”
The
de facto examples of priestly celibacy are contained in the Bible, and some examples have already been listed.
It is fact that a celibant priesthood existed during Biblical times and the Church preceded Constantine by a few hudred years. Obviously as the Church grew and became a state religion, the
de facto practice of Priestly celibacy became formalized through civil law as the
de jure practice of Priestly celibacy. That might be the source of confusion for non-(Roman) Catholics.