In each iteration, the algorithm will produce all of the permutations that end with the element that has just been moved to the "last" position.
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Jimmy Carter was - he still - he remains to this day America's most ex of ex-presidents. You just can't believe that we elected this doofus. He was a bright enough guy and sort of well-meaning. But he was about as prepared to be president of the United States as your goofy old uncle, you know, the one that memorises baseball statistics.
You look at how Barack Obama has had to conduct himself as President. It reminds me of Jackie Robinson, how he had to be very careful to reassure people that this was all right. And you still have people trying to tear him down. They make up all sorts of lies, with the goal of making him seem illegitimate.