A debate between Sam Harris and William Lane Craig on where moral values come from and whether atheists have grounds for believing in objective moral values.
The whole series is well worth watching. I am, of course, biased but it seems fairly clear that Sam Harris didn’t fare too well. He never came to grips with the problem of his tautological definitions of “good” and “evil”, preferring, instead, to eschew logic and employ the decoy of making emotionally indignant appeals to examples of our or God’s – the God he claims isn’t there – moral failures, along with other randomly selected red-herrings.
William Lane Craig, on the other hand, pounds his points home with remorseless logic.