S1 : Human ways of life have steadily changed.
S6 : During the last few years change has been even more rapid than usual.
P : From that time to this, civilization has always been changing.
Q : About ten thousand years ago, man lived entirely by hunting.
R : Ancient Egypt – Greece – The Roman Empire – the Dark Ages and the Middle Ages – The Renaissance – the age of modern science and of modern nations – one has succeeded the other; and history has never stood still.
S : A settled civilized life began only when agriculture was discovered.

The proper sequence should be:

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