Appropriation is a process by which previously unowned
natural resources
Natural resources are resources that are drawn from nature and used with few modifications. This includes the sources of valued characteristics such as commercial and industrial use, aesthetic value, scientific interest and cultural value. ...
, particularly land, become the
property
Property is a system of rights that gives people legal control of valuable things, and also refers to the valuable things themselves. Depending on the nature of the property, an owner of property may have the right to consume, alter, share, r ...
of a person or group of persons. The term is widely used in economics in this sense. In certain cases, it proceeds under very specifically defined forms, such as driving stakes or other such markers into the land claimed, which form gave rise to the term “staking a claim.” "
Squatter’s rights" are another form of appropriation, but are usually asserted against land to which ownership rights of another party have been recognized. In legal regimes recognizing such acquisition of property, the ownership of duly appropriated holdings enjoys such protections as the law provides for ownership of property in general.
Under some systems using this method of acquiring ownership of land, it is permitted to employ violence in defending the duly appropriated holding against encroachment against the ownership or usage claims, again usually according to specifically defined forms including warnings to the encroaching party, exhaustion or unavailability of duly constituted law-enforcement resources, etc..
Libertarian
Libertarianism (from french: libertaire, "libertarian"; from la, libertas, "freedom") is a political philosophy that upholds liberty as a core value. Libertarians seek to maximize autonomy and political freedom, and minimize the state's e ...
and other property-rights-oriented ideologies define appropriation as requiring the “mixing” of the would-be owner's labor with the land claimed.
[Rothbard, Murray N.: '' Man, Economy and State with ]Power and Market
''Power and Market: Government and the Economy'' is a 1970 book by the economist Murray Rothbard, in which the author analyzes the negative effects of the various kinds of government intervention, and argues that the State is neither necessary ...
'', page 169. Ludwig von Mises Institute, 2004 A prime example of such mixing is
farming
Agriculture or farming is the practice of cultivating plants and livestock. Agriculture was the key development in the rise of sedentary human civilization, whereby farming of domesticated species created food surpluses that enabled peop ...