I am writing a series on implications of the idea that culture is essentially the behavior of a people. Last time I asserted that New Testament authors explain cultural differences between various people groups as differences of belief and value.
The second implication is that New Testament authors identify people groups (ethnicities, tribes, nations, etc.) as those of common ancestral heritage who share common culture flowing from common values. They do not think about “culture” as such; rather, they think about behavior, and they believe that the gospel changes behavior—it changes a person’s culture. Since culture is a component of religion, where religion changes, so changes culture. This creates a reorientation of race for Christians; since a race is a group that shares common values and practices, Christians will find themselves increasingly alienated from the race into which they were born and drawn into a new race united around biblical values.