For an attempt to model this problem for the individual formally, see A. M. Shefrin and Richard Thaler, "An Economic Theory of Self-control," Working Paper No. 208, Center for Economic Analysis of Human Behavior and Social Institutions (Stanford, Calif.: National Bureau of Economic Research, October 1977).
The cuneiform inscription in the Liberty Fund logo is the earliest-known written appearance of the word "freedom" (amagi), or "liberty." It is taken from a clay document written about 2300 B.C. in the Sumerian city-state of Lagash.