Hayek wrote an essay, "Why I Am Not a Conservative" (included as an appendix to The Constitution of Liberty), in which he disparaged conservatism for its inability to adapt to changing human realities or to offer a positive political program, remarking, "Conservatism is only as good as what it conserves." Although he noted that modern day conservatism shares many opinions on economics with classical liberals, particularly a belief in the free market, he believed it's because conservatism wants to "stand still," whereas liberalism embraces the free market because it "wants to go somewhere." Hayek identified himself as a classical liberal, but noted that in the United States it had become almost impossible to use "liberal" in its original definition, and the term "<answer>libertarian</answer>" has been used instead. In this text, Hayek also opposed conservatism for "its hostility to internationalism and its proneness to a strident nationalism" and its frequent association with imperialism.
What word is used in the United States to identify Hayek's ideology?
libertarian