Question: Don’t people in different cultures differ on what they think is right or wrong? How can all mankind be held to one standard when there is such a wide variety of opinion concerning morality?
Answer: I don’t know where you get the idea that different cultures have “a wide variety of opinion concerning morality.” In fact, that isn’t the case. The Bible declares that God has written His moral laws (the Ten Commandments minus the Fourth about keeping the Sabbath) in every human conscience (Rom:2:14-15). This common moral understanding in spite of differences in culture is one of the many proofs that man did not evolve but was created in the moral and spiritual image of God.
Of course, various cultures develop customs, some of which violate God’s laws. Yet even cannibals cannot escape the realization in their conscience that they are doing wrong. They simply justify themselves because this is the way it is done in their society, but they still know it isn’t right. Don’t you think the Nazis knew in their conscience that it was wrong to murder Jews and others? They managed to justify themselves because they had become hardened to the truth; but deep inside, they still knew what was right and what was wrong. So it is with all mankind, regardless of their race, religion or culture.