The claim that moral properties are supervenient upon non-moral properties is called moral supervenience. Also, it is assumed that the properties are supervenient rather than metaphysically primitive . This is similar to the way in which objects are supervenient on atomic structure. On the one hand, behavior is not supervenient on all parts of the body. A supervenient property is one which is actual, but is secondary to some underlying reality. In this sense, many ostensibly physical properties are called supervenient.