@oristarA,
Yes. Of disunion.
What they are learning is what the possible difficulties, problems, unintended consequences might come about because of that action.
"The Temper" refers to trying to determine what actions of disunion might bring about the best result.
(When you temper steel it is possible to make it too brittle or too soft, you have to figure out what the right amounts of heat and metal additives are to get the best resulting steel.
Joe(it's a good word, but you have to know from whence it came.)Nation