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The “Knocking on Wood” Wikipedia page mentions Roud’s conclusion, and this claim of a 19th century origin has circulated online as the final say on the matter. If you go back to the original, though, Roud’s proposal actually ends on an ambivalent note: “Before this theory [of 19th century origins] can be finally accepted, however, an examination of the history of European forms of this custom would be advisable.”
Born in Egypt but raised in the United States, Michael attended Harvard University as an undergraduate and earned a law degree from Stanford. He began his career with a quick stint at Goldman Sachs as an associate in the communications, media, and entertainment investment banking group, before jumping into tech at Tellme Networks in 1999, a voice-recognition company that he helped run before it was acquired by Microsoft in 2007 for roughly $800 million.
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