把这一句，留给此刻的你
Let's trace the birth of an idea. It's born as rampant radicalism, then it becomes progressivism, then liberalism, then it becomes moderated conservative, outmoded, and gone.
让我们追溯一个想法的诞生。它诞生时是一种猖獗的激进主义，然后它变成了进步主义，然后是自由主义，然后它变成了温和的保守主义，过时了，消失了。