How?
History tells us that Lincoln was a politically ambitious lawyer who eagerly prostituted himself to northern industrialists who were unwilling to pay world prices for their raw materials and who, rather than practice real capitalism, enlisted brute government force — “sell to us at our price or pay a fine that’ll put you out of business” — for dealing with uncooperative southern suppliers. That’s what a tariff’s all about. In support of this “noble principle”, when southerners demonstrated what amounted to no more than token resistance, Lincoln caused an internal war to begin that butchered more Americans than all of this country’s foreign wars — before or afterward — rolled into one.
Lincoln saw the introduction of total war on the American continent — indiscriminate mass slaughter and destruction without regard to age, gender, or combat status of the victims — and oversaw the systematic shelling and burning of entire cities for strategic and tactical purposes. For the same purposes, Lincoln declared, rather late in the war, that black slaves were now free in the south — where he had no effective jurisdiction — while declaring at the same time, somewhat more quietly but for the record nonetheless, that if maintaining slavery could have won his war for him, he’d have done that, instead.