abrupt changes occur in life conditions, and the norms that usually operate may no longer seem adequate as guidelines for conduct". This is a particular issue after the fall of the Soviet Union, mass migrations from developing to developed countries, and the general sense of disillusionment that characterized the 1990s. Traditional values that had already been questioned (especially during the 1960s) were met with further scepticism in the 1990s, resulting in a situation where individuals rely more often on their own judgement than on institutions of authority: "The individual not only has become more independent of the churches, but from other social institutions as well. The individual can make more personal choices in far more life situations than before". These choices are not necessarily "negative": Halman's study found that, as of 1998 (over 20 years ago), Europeans remained relatively conservative morally, even though the authority of the Church and other institutions had eroded. Relationships One concept used in regard to specific relationships is that of parental alienation, where a separated child expresses a general dislike for one of their parents (who may have divorced or separated). The term is not applied where there is child abuse. The parental alienation might be due to specific influences from either parent or could result from the social dynamics of the family as a whole. It can also be understood in terms of attachment, the social and emotional process of bonding between child and caregiver. Adoptees can feel alienated from both adoptive parents and birth parents. Familial estrangement between parents and adult children "is attributed to a number of biological, psychological, social, and structural factors affecting the family, including attachment disorders, incompatible values and beliefs, unfulfilled expectations, critical life events and transitions, parental alienation, and ineffective communication patterns." The degree of alienation has been positively correlated with decreased emotional functioning in the parent who feels a loss of identity and stigma. Attachment relationships in adults can also involve feelings of alienation. Indeed, emotional alienation is said to be a common way of life for many, whether it is experienced as overwhelming, unacknowledged in the midst of a socioeconomic race, or contributes to seemingly unrelated problems. Social isolation Social isolation refers to "The feeling of being segregated from one's community". Neal and Collas emphasize the centrality of social isolation in the modern world: "While social isolation is typically experienced as a form of personal stress,