The term "liberal" originally stemmed from the human quest for free inquiry and the study of the liberal arts. Aristotle explained that the greatest pleasure a free man could possess is to have the economic means to indulge himself in the study of nature, books, science (philosophy) — and the liberals arts, rather than to be forced to labor endlessly with no free time for leisure and the contemplation of life.
The State by Franz Oppenheimer (1864-1943) was recommended to me years ago by friends as a Libertarian classic of political science. However, having just finished this tome, I now suspect that some of them did not actually read the book, but instead only read passages from it.
The Founding Fathers of this great nation designed a Republican form of government. By this, they meant a government under the rule of law and not the capricious rule of man, under a written constitution whose main function is to clearly demarcate the limits of authority of the federal government.