"Where there doubtless will one day exist a sophisticated and mighty civilization, with powers I can only dimly imagine."

For how could such a sophisticated civilisation have been illiterate, and yet the 'squatter phase' literate?

There seems to be an extremely sophisticated civilization here.

Its kingdoms were heir to a sophisticated civilization.

There must lie, beyond that shining barrier, a highly sophisticated civilization.

How a sophisticated civilization can reach back to such a culture is another matter.

Combined with the vast numbers and size of the towers, this is evidence that a sophisticated civilization once existed in these remote areas.

It was easy to believe that the searchlights were playing over a sophisticated civilization indeed.

How could even their language, let alone their institutions, have survived contact with old and sophisticated civilizations?

The Lycanth came to build a sophisticated civilization and an orderly society.