PART THE FIRST
A Declaration of the Rights of the Inhabitants of the Commonwealth of Massachusetts

Article I. All men are born free and equal, and have certain natural, essential, and unalienable rights; among which may be reckoned the right of enjoying and defending their lives and liberties; that of acquiring, possessing, and protecting property; in fine, that of seeking and obtaining their safety and happiness.

If it is unalienable, it can't be taxed.