Everything in the world is different. Advocating and protecting biodiversity not only establishes the existence of human beings and their social differences from the perspective of biology, but also forms a universally accepted ideological basis and theory of human identity based on biology around the world. Many natural sciences, including biology, are the basis and theoretical basis of social sciences. Those so-called social science theories without natural science foundation, even ethnic religions, have been ruthlessly proved by history to be pseudoscientific theories. Even in the case of unlimited communication, free communication and free travel in human society, there will still be differences between human beings and the countries, ethnic groups and even families they constitute.

Differences between animals and plants, differences between species, differences between people and animals, differences between different races of human beings, differences between men and women of the same race, differences between the same person in different periods, and so on. Difference is the most common reality and source. In this sense, those who once called on mankind to move towards world harmony and establish universal social forms and lifestyles are basically confusing people, because only the demise of mankind can realize this so-called ideal with the logic of power politics.

Difference not only means the existence of advantages, but also means the need for mechanisms for coordination, compromise and conflict avoidance. Otherwise, there will never be peace in the world, and local, regional and even global wars will appear almost regularly. Mankind learned a lesson from the Second World War and used the form of the United Nations to coordinate, compromise and avoid conflicts. Although World War III has not broken out on earth since 1950s, those countries or races that have taken the lead have and will continue to use their own advantages to dominate or influence the development direction of the world. Driven by some politicians or political interest groups, these countries or races with advantages try to impose their ideology and even their way of life on the whole world, so conflicts have been and will continue to be inevitable, but one local or regional war after another has consumed the military, economic and even cultural advantages of these countries or races to a certain extent, even though they can gain the deterrence of land, energy and power politics through wars.

It is not the most important thing to discuss the differences in the world, but the differences in a country, a race, a region, a community and an enterprise, because those ideas and theories that are too far away from people cannot serve mankind well. Regardless of religious beliefs or political opinions, I am afraid that there is a recognized way to deal with differences in the historical development of human society so far, that is, the government, which is a coordinating body elected, recognized and authorized by various interest groups under a game rule.

Admitting the existence of differences is the most scientific and wise world view. In addition, explicit and implicit differences always exist. In order to ensure that the universal rights of survival and development of human beings and the whole animal and plant world are not plundered, occupied or driven by powerful groups or power politics, and to make human beings, animals and plants as fair and just as possible in their lives, it is necessary to promote the implementation of a broad moral system all over the world. With the efforts of generation after generation, let the whole life on the earth, including human beings, live in a gradually improved and constantly improved living environment, which requires human beings to be more conscientious and responsible as the dominant living environment on the earth. Otherwise, just as western countries are exploring other planets and looking for living space outside the earth, giving up the earth may be a road they have to take except fuel shortage and environmental degradation.

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