Realm of Living Beings (Society)
This indicates the collective body of individuals who interact with one another. Each individual is born into a social environment with its own unique set of cultural or hereditary rules. A person is a product of this and equally contributes to and modifies it.
This also encompasses other life forms. For example, walking through a forest we can encounter a large amount of life forms, from birds above our heads to tiny organisms in the ground beneath our feet, all occupying their own unique environment and cycle of existence. Yet each one is joined to us and each other by a thread of life. SGI President Daisaku Ikeda explains:
Nature is one vast organic movement directed by a single life-force and operated by means of a single gigantic nervous system, a majestic and harmonious order in which countless living organisms coexist and co-operate, but also devour each other to keep the system alive.