Does Disagreement Prove There Are No Objective Moral Truths?

On Wednesday I had the privilege of teaching a large group of high school students attending the Hume Lake Christian Camp. In one of my three sessions, I talked about the nature of truth and the distinction between objective and subjective truth claims.
This included a discussion related to the nature of moral truth. While
most people readily accept the self-evident nature of objective truth
when it comes to material claims (i.e. “Jim’s car is a Hyundai”), larger
metaphysical claims about immaterial realities (i.e. “God exists”) or
moral claims (“Premarital sex is morally wrong”) are sometimes thought
to be entirely subjective (a matter of personal opinion). I took some
time to demonstrate the reality of objective moral truth to these students, and we talked about several examples of objective moral truth claims.

As
an unbeliever, I rejected the existence of objective moral truth
because I recognized the implication. If there are objective moral
truths transcending time, location and culture, how would these truths
arise? What kind of transcendent, objective source could adequately
explain their existence? For many years I simply refused to accept moral
laws as anything other than functional, commonly accepted social conventions.
In addition, I pointed to moral disagreements between like-minded
social groups as evidence for the non-existence of transcendent moral
truth. I’ve discussed this with many atheists over the years (some very
recently). If we were to poll any group of people embracing the same
“objective” moral standard, I bet we would come away with a number of
contradictory responses related to how these objective laws ought to be
employed or expressed. In fact, we might even discover large
disagreements related to the nature or identity of the objective laws
themselves. If like-minded groups who accept the existence of
transcendent, objective moral laws can’t agree on the identity or nature
of these laws, isn’t this good evidence against their existence?

No.
Over the years, I’ve investigated literally hundreds of crimes in which
multiple witnesses have been asked to describe the same suspect. I
seldom get witnesses who agree on their descriptions. In one particular
case, after four witnesses observed a “purse snatch” street robbery, I
interviewed them in an effort to reconcile the apparently contradictory
statements they gave the responding officers. When separated from one
another and interviewed at the scene, all four witnesses gave a
different description of the suspect’s clothing and one of them
described the suspect’s race differently. Interestingly, all four
witnesses seemed to be in a similarly sufficient geographic position
related to the robbery; all four should have been able to get a clear,
unobstructed view. Why were their descriptions so different? As it
turned out, much of the difference could be attributed to their personal
response to the violent nature of the crime committed in their
presence. Some of the witnesses were so disturbed by the offense they
simply could not pay attention to the details related to the suspect.
Some were more accustomed to this level of violence, and, as a result,
were much calmer in their response and more attentive to details. Some
witnesses had never seen such a crime or thought about what might be
important to remember. Other witnesses possessed a bit more “street
savvy” and made the effort to remember important details. In addition to
all of this, one witness was a victim of a similar crime and repeatedly
misidentified the race of the suspect; her description was influenced
by her own experience as a victim.

The fact four people could not
agree on the objective truth related to the suspect in this case did not
refute the objective nature of the suspect, and their disagreement was
not evidence against his existence. All were certain a suspect existed,
and all would readily admit his existence was not a matter of personal
opinion. In spite of this, none of them could agree entirely on his
description (his nature). In a similar way, theists who acknowledge the
existence of objective, transcendent moral truths may disagree on their
identity and (more likely) how these objective laws ought to be employed
or expressed. This disagreement is not evidence against the existence
of transcendent moral truth; it is merely a reflection of the nature of
humans who are trying to be good witnesses. Some of us have thought more
deeply about this than others. Some of us allow our own personal moral
history to color our observations and descriptions. My purse snatch
witnesses couldn’t agree on the nature of the suspect. In spite of this,
one objective suspect existed and his identity was not dependent on the
witness’ opinions. Theists often disagree on moral issues. In spite of
this, objective (transcendent) moral truths exist and their identity is
not dependent on the opinions of theists.

[By the way, J. Warner’s book is on sale for less than $4.00 (Kindle and eBook) for a very limited time.]