In the question given below, the passage consists of six sentences. The first and sixth sentences are given at the beginning. The middle four sentences have been removed and jumbled up. They are labelled as, P, Q, R, and S. Find out the proper order for the four sentences.
S1 : Biological evolution has not fitted man to any specific environment.
P: It is by no means a biological evolution, but it is a cultural one.
Q: His imagination, his reason, his emotional subtlety and toughness makes it possible for him not to accept the environment but to change.
R: And that series of inventions by which man from age by age has reshaped his environment is a different kind of evolution.
S: Among the multitude of animals which scamper, burrow swim around us he is in the only one who is not locked into his environment.
S6: That brilliant sequence of cultural peaks can most appropriately be termed as the ascent of man.
The proper sequence should be