Why does the idea of progress loom so large

In the modern world? Surely because progress of

A particular kind is actually_ 26 place around us

And is becoming_27_ manifest（明显的）

28 mankind has undergone no general

Improvement in intelligence or morality, it has

Made 29 progress in the accumulation of

Knowledge. Knowledge began 30 as soon as the

Thoughts of one individual could be

Communicated 31 another by 32 of speech.

5.26

Knowledge could then be not only communicated but also 34

Libraries made education 35, and education in its turn added 36

Libraries: the growth of knowledge followed a kind of

Compound interest law, 37 was greatly enhanced by the

Invention of 38 .All this was comparatively slow until, with the

Coming of science, the tempo(速率）was suddenly_39.Then

Knowledge began to be accumulated according to a systematic

Plan. The trickle became a stream; the stream has now 40 a

Torrent. Moreover, 41 soon as new knowledge is acquired, it is

Now turned 42 practical account. What is called modern

Civilization is not the result of a 43 development of all men's

Nature, 44 of accumulated knowledge applied 45 practical life.

5.33