One party platform stated that Hispanics and others should not “be barred from education or employment opportunities because English is not their first language.” It highlighted the need for “dependable and affordable” mass transit in cities, noting that “mass transportation offers the prospect for significant energy conservation.” And it prefaced its plank on abortion by saying that “we recognize differing views on this question among Americans in general — and in our own party.”

The other party platform said that “we support English as the nation’s official language.” It chided the Democratic administration for “replacing civil engineering with social engineering as it pursues an exclusively urban vision of dense housing and government transit.” And its abortion plank recognized no dissent, taking the position that “the unborn child has a fundamental individual right to life which cannot be infringed.”

No, they are not the platforms of the Democratic and Republican Parties. They are both Republican platforms: the first from 1980, at the dawn of the Reagan revolution, and the second the 2012 Republican platform that was approved on Tuesday afternoon in Tampa, Fla.

The new platform — with its call to reshape Medicare to give fixed amounts of money to future beneficiaries so they can buy their own coverage, its tough stance on illegal immigration and its many calls to shrink the size and scope of government — shows just how far rightward the party has shifted in both tone and substance in the decades since it adopted the 1980 platform, which was considered a triumph for conservatives at the time.