—that this nation, under God, shall have a new birth of freedom, and that government of the people, by the people, for the people, shall not perish from the earth."
i feel like he means that this democratic government that they have established will never be abolished. he probably wants america to remain a democracy since he saw other nations around the world perhaps even “failing” because they have a different style of government. he wants the people to have a say in the government too, not to be dictated around by a leader.
