A Society (n.) is its own reason: its members are alike because each imposes on the others the very conditions that produce the likeness.
A Society (n.) is a nexus whose members share a form not by coincidence but because each inherits it from the others by feeling it.
Society (n.) in Whitehead's sense is a self-sustaining nexus: its members are alike because each imposes on the others the conditions that produce the likeness.
A Society (n.) can be as modest as a man's knowledge of Greek — the string of his moments, from learning it to losing it, each handing it on to the next.
Society (n.) in Whitehead's sense can harbour others within it: molecules inside a living cell are subordinate societies, while the empty space inside the cell is only a subordinate nexus.