Social alienation is 'a condition in social relationships reflected by a low degree of integration or common values and a high degree of distance or isolation between individuals, or between an individual and a group of people in a community or work environment'. It is a sociological concept developed by several classical and contemporary theorists. The concept has many discipline-specific uses, and can refer both to a personal psychological state (subjectively) and to a type of social relationship (objectively). Social alienation is 'a condition in social relationships reflected by a low degree of integration or common values and a high degree of distance or isolation between individuals, or between an individual and a group of people in a community or work environment'. It is a sociological concept developed by several classical and contemporary theorists. The concept has many discipline-specific uses, and can refer both to a personal psychological state (subjectively) and to a type of social relationship (objectively). The term alienation has been used over the ages with varied and sometimes contradictory meanings. In ancient history it could mean a metaphysical sense of achieving a higher state of contemplation, ecstasy or union—becoming alienated from a limited existence in the world, in a positive sense. Examples of this usage have been traced to neoplatonic philosophers such as Plotinus (in the Greek alloiosis). There have also long been religious concepts of being separated or cut off from God and the faithful, alienated in a negative sense. The New Testament mentions the term apallotrioomai in Greek—'being alienated from'. Ideas of estrangement from a Golden Age, or due to a fall of man, or approximate equivalents in differing cultures or religions, have also been described as concepts of alienation. A double positive and negative sense of alienation is broadly shown in the spiritual beliefs referred to as Gnosticism. Alienation has also had a particular legal-political meaning since at least Ancient Roman times, where to alienate property (alienato) is to transfer ownership of it to someone else. The term alienation itself comes from the Latin alienus which meant 'of another place or person', which in turn came from alius, meaning 'other' or 'another'. An alienus in ancient Roman times could refer to someone else's slave. Another usage of the term in Ancient Greco-Roman times was by physicians referring to disturbed, difficult or abnormal states of mind, generally attributed to imbalanced physiology. In Latin alienatio mentis (mental alienation), this usage has been dated to Asclepiades. Once translations of such works had resurfaced in the West in the 17th century, physicians again began using the term, which is typically attributed to Felix Platter. In medieval times, a relationship between alienation and social order has been described, mediated in part by mysticism and monasticism. The Crusades and witch-hunts have been described as forms of mass alienation. In the 17th century, Hugo Grotius put forward the concept that everyone has 'sovereign authority' over themselves but that they could alienate that natural right to the common good, an early social contract theory. In the 18th century, Hutcheson introduced a distinction between alienable and unalienable rights in the legal sense of the term. Rousseau published influential works on the same theme, and is also seen as having popularized a more psychological-social concept relating to alienation from a state of nature due to the expansion of civil society or the nation state. In the same century a law of alienation of affection was introduced for men to seek compensation from other men accused of taking away 'their' woman. In the history of literature, the German Romantics appear to be the first group of writers and poets in whose work the concept of alienation is regularly found. Around the start of the 19th century, Hegel popularized a Christian (Lutheran) and Idealist philosophy of alienation. He used German terms in partially different senses, referring to a psychological state and an objective process, and in general posited that the self was an historical and social creation, which becomes alienated from itself via a perceived objective world, but can become de-alienated again when that world is seen as just another aspect of the self-consciousness, which may be achieved by self-sacrifice to the common good. Around the same time, Pinel was popularizing a new understanding of mental alienation, particularly through his 'medical-philosophical treatise'. He argued that people could be disturbed (alienated) by emotional states and social conditions, without necessarily having lost (become alienated from) their reason, as had generally been assumed. Hegel praised Pinel for his 'moral treatment' approach, and developed related theories. Nevertheless, as Foucault would later write, '... in an obscure, shared origin, the 'alienation' of physicians and the 'alienation' of philosophers started to take shape—two configurations in which man in any case corrupts his truth, but between which, after Hegel, the nineteenth century stopped seeing any trace of resemblance.' Two camps formed following Hegel, the 'young' or 'left' Hegelians who developed his philosophy to support innovations in politics or religion, and the 'old' or 'right' Hegelians who took his philosophy in a politically and religiously conservative direction. The former camp has had a more lasting influence and, among them, Feuerbach differed from Hegel in arguing that worship of God is itself a form of alienation, because it projects human qualities on to an external idea, rather than realising them as part of the self.