We descend from the same family of common ancestors. We are, in a quite literal sense, siblings, and like siblings we depend on each other's love and care and responsibility. We are interdependent not just in our families and communities, but in nations, and increasingly on a global scale - just as we are also interdependent with nature and the earth. Yet at the same time things are many. Matter-energy is embodied in many different particles and bodies.
Diversity is essential to the beauty and interest of nature and the universe.
Without it everything would be blank and monotonous. All these beings have their own separate existence. Existence as a separate individual is always more or less temporary, from the day's life of a mayfly to the billions of years of a star. Sooner or later, humans, cats, trees, planets, stars will end their temporary existence and be reabsorbed, recycled and recreated as part of new phenomena. Yet even if their existence is temporary, this does not mean that it is unreal or unimportant.