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right, or the capacity, of self-determination,
as an expression of the individual will.
Gertrude Himmelfarb describes John Milton's Areopagitica as the "Magna Carta of free thought". Traditionally philosophers have distinguished two senses of the word "freedom". The most common use is "negative" and is defined as the absence of constraint. Thus for Hobbes, one is free when the law is silent on a subject. But "freedom" is also used in another, "positive" sense, where freedom is defined as the ability to transcend the social and cultural conditions which limit the potential of the individual for self-actualization. This latter sense is common to Romanticism and the individualistic philosophy of 19th century Germany.
Isaiah Berlin examined the difference between these two rival views of freedom in his 1958 essay Two Concepts of Liberty.
One of the most notable contributors to the modern conception of freedom is 19th Century English philosopher John Stuart Mill who, in his magnus opus On Liberty, outlines several freedoms which were deficient in Victorian Britain. He largely bases his political philosophy on the harm principle - which basically demands that people be allowed do as they will unless someone is harmed (physically).
Another common distinction made between kinds of freedom is the difference between "freedom from" social and political ills (which, some argue, is really more accurately described as safety or security), and "freedom to" do what one wants (for which some consider the term "liberty" more precise).
Political freedom is often connected to thoughts of civil liberties and human rights, and so the fundamental ideas of positive and negative freedom inform the corollary debate over positive and negative rights.
In most Western democratic societies, key freedoms legally protected by the government include:
Many nations have specific chapters of their constitutions which codify these freedoms in a bill of rights.
The concept of what constitutes true "freedom" is often disputed by different groups on the political spectrum. For example, in right-wing libertarianism (i.e., libertarianism as it is understood in United States; see libertarian socialism for libertarianism as it is understood in most of the rest of the world) freedom is defined in terms of lack of government interference; in particular, capitalists place a high value on freedom from government interference in the economy. This kind of freedom may be referred to as a kind of negative liberty.
Those on the political left, such as Marxists, may criticize negative liberty as placing too much emphasis on the needs of the individual, while ignoring the goal of social equality. They may be more likely to see freedom in terms of positive liberty, which can be described as the freedom to act to realize one's own potential. Freedom in this sense may include freedom from want, poverty, deprivation, or oppression. Many anarchists see negative and positive liberty as complementary concepts of freedom.
Environmentalists such as the Greens often argue that political freedoms should include some social constraint on use of ecosystems. They maintain there is no such thing, for instance, as "freedom to pollute" or "freedom to deforest" given the downstream consequences. The popularity of SUVs, golf, and urban sprawl has been used as evidence that some ideas of freedom and ecological conservation can clash. This leads at times to serious confrontations, e.g. the Earth Liberation Front's arson of homes encroaching on the desert, and clashes of values reflected in advertising campaigns, e.g. that of PETA regarding fur.
In jurisprudence, freedom is the right of autonomously determining one's own actions; generally it is granted in those fields in which the subject has no obligations to fulfil or laws to obey, according to the interpretation that the hypothetical natural unlimited freedom is limited by the law for some matters.