The philosopher John Stuart died at the age of 66. Here is all you want to know, and more!
Biography - A Short Wiki
This important nineteenth-century philosopher contributed to economic, social, and political theory, publishing an 1859 work, On Liberty, that laid out his theory of personal freedom and placed a limit, “the harm principle,” on the scope of individual autonomy.
He grew up in London, England, as the son of Harriet Burrow and philosopher and economist James Mill. In his fifties, he married his longtime friend Harriet Taylor.
Popular opinions, on subjects not palpable to sense, are often true, but seldom or never the whole truth.
We have a right, also, in various ways, to act upon our unfavorable opinion of anyone, not to the oppression of his individuality, but in the exercise of ours.
The most cogent reason for restricting the interference of government is the great evil of adding unnecessarily to its power.
The dictum that truth always triumphs over persecution is one of the pleasant falsehoods which men repeat after one another till they pass into commonplaces, but which all experience refutes.
If all mankind minus one were of one opinion, mankind would be no more justified in silencing that one person than he, if he had the power, would be justified in silencing mankind.