Final answer:
The climax of Abraham Lincoln's Gettysburg Address is the line '...that government of the people, by the people, for the people, shall not perish from the Earth.'
Step-by-step explanation:
The climax of Abraham Lincoln's speech from November 19, 1863, known as the Gettysburg Address, is the line:
'...that government of the people, by the people, for the people, shall not perish from the Earth.'
This impactful line emphasizes the enduring nature of democratic government and asserts that the United States should remain a government that is run by and for the people.