Greg M. Epstein, Harvard University's humanist chaplain. Epstein's new book, "Good Without God: What a Billion Nonreligous People Do Believe," explains the moral code of people neither frightened by the threat of hellfire nor blissed out by the promise of heaven. Nonbelievers, writes Epstein, can live ethical lives without the framework of religion because it is the practical and right thing to do.
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