One division of the worlds population can be that one is either religious or nonreligious, but nonreligious is thus defined by the absence of something else, which is perhaps not the most politically correct statement. Another example where this have been applied to some extent is in traditions. There is written tradition and oral tradition (as oppose to non written tradition). Obviously, atheist would not work as that is only not believing in a divine creator. Is there a neutral term for 'nonreligious'?