On Liberty is a philosophical work by 19th century English philosopher John Stuart Mill, first published in 1859. To the Victorian readers of the time it was a radical work, advocating moral and economic freedom of individuals from the state. Perhaps the most memorable point made by Mill in this work, and his basis for liberty, is that "Over himself, over his own body and mind, the individual is sovereign". On Liberty was an enormously influential work; the ideas presented within it remain the basis of much political thought since. Aside from the popularity of the ideas themselves, it is quite short and its themes easily accessible even to a non-expert.