Complete video at: fora.tv
Author Stephen Murdoch describes how IQ testing was used as justification for eugenics programs in Nazi Germany and the United States.
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Stephen Murdoch, author of IQ: A Smart History of a Failed Idea, discusses the invention and history of the IQ test and its applications from the past to the present.
Stephen Murdoch has been working as a journalist and writer since 1999. He has written on a wide range of subjects—from legal policy and psychology, to travel and topical commentary. In 2006, Murdoch was a weekly columnist for the Santa Barbara News-Press. He has also contributed to Newsweek, Marketplace (a radio show carried by many NPR stations), The Washington Post, The Christian Science Monitor, The Washington Lawyer, The Boston Globe and other publications.

"But are there any benefits for the society as a whole ? "
Perhaps the benefit for society as a whole, is to learn to have compassion for their less intelligent brethern? And to learn to treat such aflicted people - tenderly?
After all, Souls come into a physical body for a reason - to experience this dimension in all it's variety.
Before birth, whether you believe in Re-incarnation or not, Souls are NOT floating around the Ether, playing harps and wearing long, white tunics. SOuls ar not pushed to birth here - they CHOOSE to come here.
But whether or not you agree, with the above, the important thing is that: If you ask what less intelligent people have to benefits for society - then you're also implying a question, as to: What wounded people or maimed people have for society.
This then begs a terrible question, a dilemma - and a retrogression in a civilization. Shall we then return to the days of barbarism, such as the even the Romans and the Greeks, practiced?
Or have we evolved enough to accept the less fortunate?