Jean-Jacques Rousseau,
The Social Contract & Discourses
“ Contributions levied on the people are two kinds; real, levied on commodities, and personal, paid by the head. Both are called taxes or subsidies: when the people fixes the sum to be paid, it is called subsidy; but when it grants the product of an imposition, it is called a tax. We are told in the Spirit of the Laws that a capitation tax is most suited to slavery, and a real tax most in accordance with liberty. ”
