http://www.newyorker.com/talk/content/?040308ta_talk_hertzbergMore than any other single person, Ralph Nader is responsible for the existence of automobiles that have seat belts, padded dashboards, air bags, non-impaling steering columns, and gas tanks that don’t readily explode when the car gets rear-ended...It is Nader’s doing, more than anyone else’s, that the federal bureaucracy includes an Environmental Protection Agency, an Occupational Safety and Health Administration, and a Consumer Product Safety Commission...He is the man to thank for the fact that the Freedom of Information Act is a powerful instrument of democratic transparency and accountability. He is the founder of an amazing array of agile, sharp-elbowed research and lobbying organizations that have prodded governments at all levels toward constructive action in areas ranging from insurance rates to nuclear safety...
...More than any other single person, Ralph Nader is responsible for the fact that George W. Bush is President of the United States...A post-election rogues’ gallery—Jeb Bush, James Baker, Katherine Harris, William Rehnquist and four of his Supreme Court colleagues—helped, each rogue in his or her own way, but no single one of them could have pulled off the heist without the help of the others. Nader was sufficient unto himself...
...If a Democrat is elected President in November, then the old crusader’s 2004 campaign will be merely a happily inconsequential ending to the story of a life spent mostly in creative service. If Bush is elected to a second term, then four more years of Bush policies, Bush deficits, and Bush judges will likely undo what remains of Nader’s positive legacy...
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Comment: The last two lines of the article (not pasted here) nail it.