a relative distance increase, so the contact between human group change.
the limited power of human voice and eye mean that a large lecture theatre is about the limit direct face to face communication.
beyond that the media and the communication system take over.
also as the size of space increase, so the number of people who can be involve get large.
thus the implication of the space seen on the beach extend far beyond it, underlying human organization right up to the level of the globe itself. we shall return to it again and again in this book