Treating other people as you would like to be treated. It is an ancient, universal ethical imperative. And it requires no supernatural beliefs.
Theory without data is myth: data without theory is madness.
Ubiquity must never be mistaken for biology.
My own ongoing research among secular Americans-as well as that of a handful of other social scientists who have only recently turned their gaze on secular culture-confirms that nonreligious family life is replete with its own sustaining moral values and enriching ethical precepts.