"Do no harm" is the start and finish of Wiccan morality. As Roger Scruton said, this is not an ethical doctrine at all, but modern liberal ideas in their most basic form. It means that there is no right and wrong, beyond the harm you do to others, and that you have no responsibilities to God or anyone else to do what is right. Abortion and buggery are, therefore, a normal part of a pleasure-driven way of life. That is an empty and stupid doctrine if ever I heard one.
"Love thy neighbor" is a much better moral foundation.
Here's what I think: the only thing I believe in is me, I know what I'm capable of and I know how to make my life work. I don't believe in God,
Do you actually know anything about Wicca? Of course not. The highest precept of their faith is "do no harm". Not a bad start for a moral foundation I think.
There appears to be a bit too much protesting goin on around here. Atheists interest me in their ability to demean those of established religions while vehemently defending those that are on the edges. I sometimes have to wonder about their protestations. I am a lapsed Baptist. I found that the effort to live by their creed was just something I was not able or willing to exert. However; I dont blame the Baptists for forcing their morality on me I just decided not to be a hypocrite. The reason for the rise in the new-age religions IMO is they are really easy to follow since nothing is required to do so beyond the ability to do as you will.