(September 10, 2011 at 9:01 am)StatCrux Wrote: If I were to meet an atheist who presents as a happy, confident, solvent individual, beautiful family, good friends etc (you get the picture) who went on to tell me the secret of his success in life was to lie, cheat, steal and stab others in the back at every opportunity, take no prisoners and give no quarter, be ruthless with strangers and only protect family and loved ones. How could I tell him that his behavior was "wrong" or "evil" using an atheistic worldview? "The tears of strangers are only water" would be an apt motto for this individual.
You couldn't, because atheism is not a code of morality. It is merely an absence of belief in a god or gods.
You might as well use Aunicornism(an absence of belief in unicorns) to achieve the objective.
If you used humanism though you might have a chance.
On the other hand, if you confronted a Mafia Don who was in the same situation but by his lights a good catholic how would you convince him that what he does is wrong using a christian worldview?
If you're not supposed to ride faster than your guardian angel can fly then mine had better get a bloody SR-71.