Here's pretty damning evidence that the simplistic Right/Left polarization of the last generation was driven by Nixon-bred conservatives. According to another person from the inside, namely Pat Buchanan, the politicization of complicated moral issues was exploited for cheap electoral gain. In the May 26 New Yorker article,
The Fall of Conservatism, George Packer writes:

[Pat] Buchanan gave me a copy of a seven-page confidential memorandum—“A little raw for today,” he warned—that he had written for Nixon in 1971, under the heading “Dividing the Democrats.” Drawn up with an acute understanding of the fragilities and fault lines in “the Old Roosevelt Coalition,” it recommended that the White House “exacerbate the ideological division” between the Old and New Left by praising Democrats who supported any of Nixon’s policies; highlight “the elitism and quasi-anti-Americanism of the National Democratic Party”; nominate for the Supreme Court a Southern strict constructionist who would divide Democrats regionally; use abortion and parochial-school aid to deepen the split between Catholics and social liberals; elicit white working-class support with tax relief and denunciations of welfare. Finally, the memo recommended exploiting racial tensions among Democrats. “Bumper stickers calling for black Presidential and especially Vice-Presidential candidates should be spread out in the ghettoes of the country,” Buchanan wrote. “We should do what is within our power to have a black nominated for Number Two, at least at the Democratic National Convention.” Such gambits, he added, could “cut the Democratic Party and country in half; my view is that we would have far the larger half.”

The Nixon White House didn’t enact all of these recommendations, but it would be hard to find a more succinct and unapologetic blueprint for Republican success in the conservative era. “Positive polarization” helped the Republicans win one election after another—and insured that American politics would be an ugly, unredeemed business for decades to come.