Despite hanging out with fishermen, however, and the supposed ubiquity of a fish-based diet, there was a strong strain of vegetarianism in the early Church. It did not originate with Christianity:
As long as Man continues to be the ruthless destroyer of lower living beings, he will never know health or peace. For as long as men massacre animals, they will kill each other. Indeed, he who sows the seed of murder and pain cannot reap joy and love. [Pythagoras]
There is a passage in Luke, however, that says this:
34 “But watch yourselves lest your hearts be weighed down with dissipation and drunkenness and cares of this life, and that day come upon you suddenly like a trap. [Luke 21:34, English Standard Version
Nothing unusual there. The King James Version uses the phrase "surfeiting, and drunkenness"; the New International Version calls it "Carousing, drunkenness and the anxieties of life."
If we go back further, however, we find something interesting in the Curetonian Gospels. William Cureton in 1848 published a set of manuscripts from a Syrian monastery in Lower Egypt. These Gospels were in Aramaic and the manuscript dated (it was theorized) from the 5th century CE, a copy of a 2nd century original. It is a version that was never translated to Greek. This very early version has a different reading of Luke 21:34, namely:
Be on guard, so that your hearts do not become heavy with the eating of flesh and with the intoxication of wine and with the anxiety of the world, and that day come upon you suddenly; for as a snare it will come upon all who dwell upon the surface of the earth.
Ebionites—early Judaeo-Christian Gnostics—maintained that Jesus, James the Just, and John the Baptist were vegetarians. Irenaeus and Eusebius, early Christian writers, discuss the feeding of the 5000 and mention bread but do not mention fish. Matthew 16:9 has Jesus saying to the Apostles "Do you not remember the five loaves for the five thousand, and how many baskets you gathered?" No fish are mentioned.
It would appear to some that fish were added to the original story, but less-than-meticulous editing forgot to change Jesus' later reference to the event.
What changed? Was there a deliberate attempt to suppress the idea of vegetarianism, and if so, why? I don't believe it was an economical decision to avoid upsetting some early Medieval butchers' guild. We will never know exactly why things were altered to add meat eating (maybe it would be more accurate to say "animal eating"?) to the Christian diet. Maybe it was an attempt to make conversion more palatable to the Roman world? Maybe the idea was to adapt Christian ideas to a European diet?
That last theory, of course, assumes that the European diet was meat-based, which is a good thought to set up the next post ... tomorrow.