The Vanishing Feeling of Freedom
So simple, even a caveman can get it.
The primary reason why it is so difficult to defend political liberty today is because freedom is a rational construct, and thus cannot be understood by the irrational. Children, or adults whose moral reasoning skills are stalled at childish levels, are unable to experience it -- they literally don't know what they are missing.
This is why authoritarians of all stripes are hell-bent on producing and maintaining a society of childish citizens: dependent, trusting of the hand that feeds, obedient, pleasure-centered -- perhaps capable of proficiency in well-defined tasks, but frightened, above all else, of being left to "fend for themselves."
“The fact is that the average man’s love of liberty is nine-tenths imaginary, exactly like his love of sense, justice and truth. He is not actually happy when free; he is uncomfortable, a bit alarmed, and intolerably lonely.” ~ H. L. Mencken