In libertarian circles it is a conventional position that the word that describes our opposite is "statism," adherents of which are "statists." I challenge that assumption.
In the first place, most people are unfamiliar with the term “statism.” Its use merely adds to the aura of weirdness and abnormality surrounding the advocacy of liberty. To the extent that voters don't know the definition of “statism,” any argument relying on it cannot help us win elections.
Second, I am not an etymologist and lack data to prove this, but my gut feeling is that libertarian writers in the 1930s to 1960s felt comfortable using the word “statist” because (Ayn Rand comes to mind) they spoke French and viewed “state” as the English translation of état. In the USA, however, “state” specifically refers to one of the 50 states. The better translation of état is “nation” or “government.” So I propose that “statism” be retired in favor of either "nationalism" or "governmentalism" as the word by which we designate the opposite of libertarianism.
To the extent that voters don't know the definition of “statism,” any argument relying on it cannot help us win elections.
“Nationalism” is particularly attractive because it conjures up connotations of National Socialism as the end point of liberty's opponents. “Governmentalism,” on the other hand, pinpoints the government as our nemesis. Yes, “state” can also mean “government,” but I feel that my proposal would best align our language with that of the people we want to reach.