Ultimately, Ratnesar argues that Reagan's speech offers lessons for the political problems of today. That it should reminds us that historically, thing that once seemed immutable DO change.
My conversation with Romesh Ratnesar:
"To discover to the world something which deeply concerns it, and of which it was previously ignorant; to prove to it that it had been mistaken on some vital point of temporal or spiritual interest, is as important a service as a human being can render to his fellow creatures..." John Stuart Mill, "On Liberty"