<span>a slave who had lived in the free state of Illinois and the free territory of Wisconsin before moving back to the slave state of Missouri, had appealed to the Supreme Court in hopes of being granted his freedom.</span>
I belive the answer is the filibusters.
I believe the events are nuclear war and nuclear peace.
The use of nuclear within warfares indeed would definitely resulted in more serious damage for both nations involved.
But, on the bright side, the existence of nuclear weapon make nations MUCH LESS likely to involve in the warfares because they know none of them would won the war without having receive large amount of damages