It doesn't seem to dawn on most
people that just because the Gospel accounts are the only sources
for the Christ story doesn't make them trustworthy: people will
derive their understanding of truth from them nonetheless. Besides,
many of our philosophical predecessors were marched off to a
blazing death for even questioning the validity of the Christian
claims. So, you won't find many people before the Enlightenment who
were willing to dispute what the Christian Churches have asserted
over the centuries. And even though today disputing the Christian
Church seems to be a relatively safe activity, most people are
still a bit jittery about doing so -- and for good reason.
The Christian Era chronology was fixed in Roman Catholic Europe and
the English-speaking world long before any scholarship began to
questions the historicity of Jesus. (As I mentioned above, the
life-expectancy of any such scholars stopped being an issue only
with the advent of the modern world's first openly secular nation,
The United States of America.) Even atheism was not intellectually
tenable until Charles Darwin answered the Argument from Design in
1859, so most people simple went along with what had been
established because it was convenient and because the Gregorian
Calendar works down to a few seconds every decade (which are
adjusted out in nuclear clocks every so often by a world council
appointed by the nations who use this system to keep track of such
matters). But the historicity of Jesus stopped being an issue when
Christianity became the state religion of the Roman Empire. The
question of Christ's historicity did not resurface until after the
Age of Enlightenment, when Strauss and Renan started to question
the validity of the Gospel Accounts.
Even a hundred years ago, only very obscure scholars openly denied
the historicity of Christ. One's tenure at a Church-owned
university (or the state university of a Christian nation such as
Germany or England) was always a concern, so even if a scholar
personally doubted the historicity of Jesus, his writings did not
reflect this in a way that encouraged open discussion; rather,
facts were detailed without the accompanying conclusions spelled
out. Arthur Drews, one of the earlier proponents of the Jesus Myth
model, used arguments that are not popular amongst the Jesus Myth
proponents of today.
Besides this, the Jesus Myth model itself is, by nature, not a
"strong" argument but a "weak" argument. By this I mean that it
does not assert that no historical Jesus existed, but rather shows
that there is not enough evidence to show that a historical figure
named Jesus did exist, whose life story eventually became
embellished to become the Gospel story we all know. That is, the
Gospel stories can be explained without there having been a
historical figure behind them. The rules of logic show that it is
impossible to disprove an existential claim (a claim that a thing
exists). So, most Jesus Myth proponents of today will admit that
they cannot prove that Jesus did not exist (and, indeed, do not
make this claim, at least using that language).
In light of this, I don't foresee any drastic changes even being
proposed on the basis of there never having been a Jesus, simply
because nobody is claiming that no Jesus ever existed. We do
recognize that Jesus is widely seen as the founder-figure of the
religion which dominated Europe for sixteen centuries (up until
after the First World War), and which has come to dominate the
United States since the onset of the Cold War (though it was not
the major player before then that Christians make it out to have
been). So, even if Jesus is not who they say he is, he is still
widely seen as an influential figure in Western culture, and this
alone would probably prevail in any discussion regarding any
changes that may be proposed.
http://www.positiveatheism.org/mail/eml8701.htm