The following six sentences come from a paragraph. The first and the last sentences are given. Choose the order in which the four sentences (PQRS) should appear to complete the paragraph.
S1: Man, when first came, must have been surrounded by great animals and he must have lived in fear of them.
S6: Gradually, however, man raised himself and became more and more powerful till he became stronger than any animal.
P: He makes the animals do what he likes.
Q: But in those days he was not the master but a poor hunted creature himself trying to keep away from the great animals.
R: Today man is the master of the world.
S: Some he tames, some he eats and some he shoots for pleasure.
The proper sequence should be: