2) it is believed because it plausibly explains an observation (increasing global temperature [for a time], increasing heart attacks from smoking in the 1950s and 60s). It taps into large anxieties about too much wealth, too much happiness, in western societies. There must be sin somewhere, and the public is ready to flog itself in the cause of a secularized idea of God, uh, I mean Good.
3) the causal relationship is weaker than first supposed; the research is found to be sloppy, the facts have been fudged, subsequent studies do not fully support the original claims, nevertheless the orthodoxy is promulgated all the more harshly for being doubted.
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The nation’s top nutrition advisory panel has decided to drop its caution about eating cholesterol-laden food, a move that could undo almost 40 years of government warnings about its consumption.
The U.S. government is poised to withdraw longstanding warnings about cholesterol