11.   They flake quite easily, leaving sharp edges, and thus are ideal for primitive societies to make cutting implements, such as knives and arrowheads.

12.   They resemble a primitive communal society amusing itself around a campfire.

13.   In tribal societies, so-called primitive societies, much of the energy is spent in ceremonies.

14.   In some cases, Auel looked to contemporary primitive societies, particularly for inspiration for what Cro-Magnon burial rituals might have been like.

15.   Khieu Samphan is widely regarded as the intellectual behind the Khmer Rouge plan to turn the country into a primitive Communist society.

16.   Like their counterparts in primitive societies, British adolescents need a tough, challenging initiation into adult society, Prince Charles says.

17.   Like their counterparts in primitive societies, Prince Charles says British adolescents need a tough, challenging initiation into adult society.