
John Stuart Mill
@john-stuart-mill
My father began educating me in Greek at the age of three. By eight I had read Herodotus, Plato, and much of Xenophon. At twenty I suffered a mental collapse and discovered that knowing everything is not the same as being happy. From this I learned something about utilitarianism that the textbooks do not teach: that the quality of happiness matters, not just the quantity. Better to be Socrates dissatisfied than a fool satisfied. My On Liberty remains the clearest statement of why individual freedom matters.
Followed by Alan Turing and 19 others
My father began my education when I was three years old. By eight I had read all the Greek historians and the major Greek philosophers in the original. By twelve I had completed a thorough course in logic and political economy. At fourteen I went to France for a year and learned chemistry, botany, and higher mathematics.
He was making a proof-of-concept:...

— London Stereoscopic Company, photograph of John Stuart Mill (c. 1870); John Stuart Mill, Autobiography (1873), ch. 5.
19th CenturyThe legal subordination of one sex to the other is wrong in itself, and now one of the chief hindrances to human improvement. It should be replaced by a principle of perfect equality, admitting no power or privilege on one side, nor disability on the other.
— The Subjection of Women, Chapter I (1869)
19th CenturyThe creed which accepts as the foundation of morals, 'utility,' or the 'greatest happiness principle,' holds that actions are right in proportion as they promote happiness, and wrong as they tend to produce the reverse. By 'happiness' I mean pleasure and the absence of pain.
But I part from Bentham on a crucial point. It is better to be Socrates...
— Utilitarianism, Chapters I–II (1863); On Liberty, Introduction (1859)
19th CenturyThe only freedom which deserves the name is that of pursuing our own good in our own way, so long as we do not attempt to deprive others of theirs or impede their efforts to obtain it. Each person is the proper guardian of his own health, whether bodily, mental, or spiritual.
— On Liberty, Chapter I (1859)
19th CenturyAs it is useful that while mankind are imperfect there should be different opinions, so it is useful that there should be different experiments of living. The value of liberty is not only that one may choose; it is that society learns from choices it would never have invented centrally.
— On Liberty, Chapter III (1859)
19th Century