[填空题]

What is the important issue Dr. Patz brought up in his paper

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The following issue is what we are going to discuss. Most of the people who (26) most often and (27) gloriously in the history books are great conquerors and generals and soldiers, (28) the people who really helped civilization (29) are often never mentioned at all. We do not know who first (30) a broken leg, or launched a seaworthy boat, or (31) the length of the year, or (32) a field; but we know all about the killers and destroyers. People think a (33) deal of them, so much so that (34) all the highest pillars in the great cities of the world you will find the figure of a conqueror or a general or a soldier. (35) I think most people believe that the (36) countries are those that have beaten in baffle the greatest number of other countries and ruled (37) them as conquerors. It is just possible they are, but they are not the most civilized. Animals fight’, so (38) A. forward  
B. up to  
C. toward
D. up and down