世界史/world
history
二十世紀/the 20th century
知識/knowledge
経験/experience
I believe
we should learn more about 20th century world history. During the 20th century
there were a lot of wars around the world, but we have no experience and
no knowledge about the wars. To know how senseless war is, and to never make
the same mistake again, we should study world history. (54words)