The misfortunes of human beings may be divided into two
classes: Firstly, those inflicted by the non-human environment             【A1】________
and, second, those inflicted by other people. As mankinds have
progressed in knowledge and technique, the second class has
become continually increasing percentage of the total. In old               【A2】________
times, famine, for example, was due to natural causes, although          【A3】________
people did their best to combat it, large numbers of them died of 
starvation. At the present moment large parts of the world are
faced the threat of famine, but although natural causes have               【A4】________
contributed to the situation, the principal causes are human. For
six years the civilized nations of the world devoted all their best
energies to kill each other, and they find it difficult suddenly to             【A5】________
switch over to keeping each other live. Having destroyed                    【A6】________
harvests, dismantled agricultural machinery, and disorganized
shipping. they find it no easy mater to relieve the shortage of
crops in one place by mean of a super abundance in another, as          【A7】________
would easily be done if the economic system was in normal                【A8】________
working order As this illustration shows, it is now man that is
man's worst enemy. Nature, it is true, still sees to that we are                 【A9】________
mortal, but with the progress in medicine it will become more
and more common for people to live until they have had their fill
of life . We are supposed to wish to live for ever and to look
forward to the unending joys of heaven, of which, by miracle, the
monotony will never grow stale. But in fact if you question any
candid person who is no longer young, he is very likely to tell
you that, having tasted life in this world, he has no wish to begin
again as a“new boy” in another. For the future, therefore, it may
be taken that much the most important evils that mankind have to
consider are those which they inflict each other through stupidity         【A10】________
or malevolence or both.

【A1】

【A2】

【A3】

【A4】

【A5】

【A6】

【A7】

【A8】

【A9】

【A10】