In Mary Midgley's "Try a New Sword to Man", she can explain what moral isolationism is. As she defines, moral isolationism is simply to deny that we never understand any culture except our own culture, we will judge it. "(Midgely) . She also shared some of her insight about ethics. She said, "Those who recommend this, I think that the world is divided into various societies with their own ideologies, blocked troops." (Mickey)
At Mary Midgley's she tried to explicitly debate from the perspective of ethical relativists using a new sword. If people can not understand other cultures, they should not judge them. This view leads to the concept of moral isolationism. That is the conclusion that the world can be divided into societies separated from ideas and systems of their own. Through Midori's work, she believes that it is impossible to understand new things and ideas if culture is separated from other cultures. Also, if it is necessary to separate cultures from each other, they also insist that society will divide because it itself is composed of people's backgrounds. In other words, her last argument is that there is a world that everyone must live, both morally and physically. Therefore, it should not be isolated from different cultures.
The custom of Japan's horse raid means "attach a new sword to a fighter plane." Because there is a possibility of war, warriors should try their own swords first. But according to Midgley this is not good, because the samurai needs to test the sword only for practice. We can not take our lives only to win and practice with war. Even if that is for the benefit of many people, letting this person experiment with is still unethical. Here they are why cloning and experimentation are condemned in Christian society as they know that it is immoral.