That principle is, that the sole end for which mankind are warranted, individually or collectively in interfering with the liberty of action of any of their number, is self-protection. That the only purpose for which power can be rightfully exercised over any member of a civilized community, against his will, is to prevent harm to others. His own good, either physical or moral, is not a sufficient warrant.
He cannot rightfully be compelled to do or forbear because it will be better for him to do so, because it will make him happier, because, in the opinions of others, to do so would be wise, or even right. These are good reasons for remonstrating with him, or reasoning with him, or persuading him, or entreating him, but not for compelling him, or visiting him with any evil, in case he do otherwise.
— John Stewart Mill, On Liberty ch. 1 (1859)
The State always moves slowly and grudgingly towards any purpose that accrues to society’s advantage, but moves rapidly and with alacrity towards one that accrues to its own advantage; nor does it ever move towards social purposes on its own initiative, but only under heavy pressure, while its motion towards anti-social purposes is self-sprung.
Words of the Sentient 