He cites the success of previous campaigns against drunk driving as a precedent.

ECONOMIST: David Cameron

Oddly, the pro-reform coalition includes Mothers Against Drunk Driving, the South Carolina Baptist Convention, the Palmetto Family Council and the Christian Coalition.

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A.R. claims to have turned down lucrative tour-sponsorship offers from liquor companies, but also nixed the idea of having a Mothers Against Drunk Driving booth at shows.

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But over the next 24 years, Mothers Against Drunk Driving and other groups pushed states to adopt the 0.08 BAC standard, the last state falling in line in 2004.

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In contrast to automakers, look at how the beer industry responded to activist groups such as Mothers Against Drunk Driving, which began targeting the alcoholic beverage companies about three decades ago.

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It was only by building broad coalitions of such highly influential constituents that MADD, during my tenure, was able to initiate a sweeping change in public attitudes and laws against drunk driving.

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Working with physicians, politicians, advocacy groups such as Mothers Against Drunk Driving and even Hollywood celebrities, the Harvard center engaged in "social marketing" that sold people on the idea of a sober driver.

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Nearly two decades later, a mother who lost her child to a drunken driver launched the organization Mothers Against Drunk Driving and led the country to enduring cultural and legislative transformation to stop drunken driving and to institute stricter alcohol policies.

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Her personal integrity has made her all the more willing to appoint special prosecutors (when she was a lawyer in Miami, she called in a special prosecutor to investigate drunk-driving charges against her own mother).

ECONOMIST: Lexington