The contrast between the views of Ruth Benedict and Mary Midgley on the relation of morality

Present and clarify in your own words the contrast between the views of Ruth Benedict and Mary Midgley on the relation of morality to culture and the significance of the diversity of cultures for moral reasoning. Be sure to discuss Benedict’s use of ‘plastic’ in describing individual human psychic development, and to explain how Midgley argues for her charge that what she calls moral isolationism is equivalent to immoralism. Why does Midgley think this makes moral isolationism an unacceptable view? Do you agree? Justify your answer.