I can't believe the high percentage of stupid people who said, "no."
OF COURSE THEY CAN!
You have studied at least a little American history, haven't you?
Not only can libertarian principles work, BUT THEY ALREADY HAVE.
WHEN? America's founding fathers did it. America was founded upon INDIVIDUAL LIBERTY -- LIBERTARIAN PRINCIPLES -- and as a result, became THE GREATEST NATION IN THE WORLD.
And furthermore, we must NOT abandon them, lest we collapse like the Soviet Union.