According to Nash's description, the circle of moral norms governing personal and social behavior has been expanding slowly and irregularly in history. By strengthening our own abilities, mankind has gradually expanded the circle, including families, tribes, countries, and theoretically, if not in practice, the whole human society. When Thomas Jefferson wrote that all men are created equal and enjoy certain inalienable rights, people understood that he was only talking about white people. However, due to the American revolution, the right to moral treatment has been extended, at least in law and society, including women and ethnic minorities.
Nash believes that the next page of history-ethics and legal rights, the expansion of animals, plants and other parts of nature-is being written. For more and more people all over the world, especially in America, faith has been deeply rooted in people's hearts.
This naturally has the right and the right to consider whether this idea is new or not. Some people defined by eastern religions are part of a big chain. But in the western Christian tradition, men want to dominate nature, not to be a part of it.
However, because environmental protection has evolved into a social movement, in recent years, Nash said that the concept of liberating nature from the persecution of human beings has been deeply rooted in people's hearts.