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Few understand this better than Sue Klebold. The mother of Dylan Klebold, one of the two boys responsible for the Columbine massacre.
In her book A Mother's Reckoning
"To discover to the world something which deeply concerns it, and of which it was previously ignorant; to prove to it that it had been mistaken on some vital point of temporal or spiritual interest, is as important a service as a human being can render to his fellow creatures..." John Stuart Mill, "On Liberty"