Thomas Sowell
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 The sex discrimination lawsuit against Wal-Mart raises questions with implications that reach far beyond this one retail giant. Too many people in the media, in academia, and even in courts of law, act as if numbers plus a preconception equals proof. The preconception is that various groups -- by race, sex, or whatever -- would be evenly represented in occupations or institutions if it were not for discrimination.

 There is no evidence for this notion -- and tons of evidence against it, from countries around the world.

 American men are struck by lightning six times as often as American women. Who is discriminating? Men are just 54 percent of the labor force but they suffer more than 90 percent of all deaths on the job. Discrimination?

 Is it discrimination against whites when Asian Americans have their applications for mortgage loans approved a higher percentage of the time than whites do, just as whites are approved a higher percentage of the time than blacks are?

 Discrimination has joined a long list of charges, including sexual harassment and child molestation, in which those who are accused are expected to try to prove their innocence. When it is impossible to prove a negative, the accused loses -- or else settles out of court, in effect paying legalized extortion, to avoid dragging out the bad publicity.

 Recently Gerald Amirault was released from prison in Massachusetts after spending 18 years behind bars on child molestation charges that today virtually no one believes. Those who have examined the evidence -- whether lawyers, laymen or judges -- have expressed amazement that such stuff had been taken seriously as evidence in a court of law.

 That is what happens when people start with a preconception and seize upon anything that looks consistent with it. Statistical disparities have been a major source of such fallacies.

 Back in the 19th century, Dr. Marcus Whitman, for whom Whitman College is named, worked on the western frontier and treated both whites and American Indians who had been stricken with measles. The whites recovered and the Indians died.

 This statistical disparity caught the attention of local Indians, who massacred Dr. Whitman and other whites. But the reason for the disparity was quite simple: Measles had never existed in the Western Hemisphere before Europeans brought it here, so the indigenous people had no biological resistance.

 One of the reasons given by Earl Warren for supporting the internment of Japanese Americans during World War II was that they lived clustered around military bases to an extent that greatly exceeded what could be accounted for by random chance.

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Thomas Sowell

Thomas Sowell is a senior fellow at the Hoover Institute and author of The Housing Boom and Bust.

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