Sam Harris talks about a number of moral and ethical issues in a 54-minute video on his blog site. One of the issues most relevant to Kos contributors was the matter of how rarely people change their minds under pressure. People do change basic views, but they tend to do so in private after - sometimes long after - they have been confronted with persuasive evidence and reason.
If you have only a few minutes to spare and don't plan to sit for the entire fifty-four minutes, tune in to his discussion to the first question in the first four minutes. His argument for the need to maintain a fully functioning crap-detector in the face of dogmatism from all sides is something Kos participants can stand to hear.
Further on in discussions of religion, he talks about the tendency of atheists and others to reject the ecstatic (my word, not his) experiences of some religious people because they have not had these experiences themselves and thus ridicule them. In the last five minutes of the video he discusses his planned research on why it is so difficult for people to change firmly held beliefs.
Above all, the video is a style manual on how to present views calmly, rationally, and persuasively. It's a good chance to see one of the most profound intellects of our time at work.
And it's free. I'm not selling Sam Harris' books. I'm just a fan.