Sentences of a paragraph are given below. While the first and the last sentences (51 and 56) are in the correct order, the sentences in between are jumbled up and named P, Q, R, S. Arrange the sentences in the correct order to form a meaningful and coherent paragraph.

(S1) Today, the world has become a much smaller place, thanks to the adventures and miracles of science.
(P) We are slowly realising that the world is a single cooperative group.
(Q) Other religions have become forces with which we have to reckon, and we are seeking for ways and means by which we can live together in peace and harmony.
(R) Mingling of population is bringing about interchange of thought.
(S) Foreign nations have become our next-door neighbours.
(S6) We cannot have religious unity and peace so long as we assert that we are in
possession of the light and all others are groping in the darkness.