Every Man has a Property in his own Person.
This no Body has any Right to but himself.
The Labour of his Body, and
we may say, are properly his.
The great and chief end therefore,
of Men uniting into Commonwealths, and
putting themselves under Government,
is the Preservation of their Property.
-- John Locke (1632-1704).
Source: Two Treatises on Government, 1690