Word: daring
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Dates: during 1950-1959
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...curve of knowledge is exponential, growing steeper like the curve of squares (1-4-9-16-25-36-49 . . .). It has changed men's lives more in the past 20 years than in the previous 50; more in that 50 years than in the previous 200. Man cannot, dare not stop its growth, though he does not know where it is taking...