the self as always already immersed in relatedness. On this account, the individual's lament of 'not belonging' is partially a by-product of traditional discourses themselves". If the self is relationally constituted, does it make sense to speak of "self-estrangement" rather than "social isolation"? Costas and Fleming suggest that although the concept of self-estrangement "has not weathered postmodern criticisms of essentialism and economic determinism well", the concept still has value if a Lacanian reading of the self is adopted. This can be seen as part of a wider debate on the concept of self between humanism and antihumanism, structuralism and post-structuralism, or nature and nurture. Mental disturbance Until early in the 20th century, psychological problems were referred to in psychiatry as states of mental alienation, implying that a person had become separated from themselves, their reason or the world. From the 1960s alienation was again considered in regard to clinical states of disturbance, typically using a broad concept of a 'schizoid' ('splitting') process taken from psychoanalytic theory. The splitting was said to occur within regular child development and in everyday life, as well as in more extreme or dysfunctional form in conditions such as schizoid personality and schizophrenia. Varied concepts of alienation and self-estrangement were used to link internal schizoid states with observable symptoms and with external socioeconomic divisions, without necessarily explaining or evidencing underlying causation. R. D. Laing was particularly influential in arguing that dysfunctional families and socioeconomic oppression caused states of alienation and ontological insecurity in people, which could be considered adaptations but which were diagnosed as disorders by mainstream psychiatry and society. The specific theories associated with Laing and others at that time are not widely accepted, but work from other theoretical perspectives sometimes addresses the same theme. In a related vein, for Ian Parker, psychology normalizes conditions of social alienation. While it could help groups of individuals emancipate themselves, it serves the role of reproducing existing conditions. This view can be seen as part of a broader tradition sometimes referred to as critical psychology or liberation psychology, which emphasizes that an individual is enmeshed within a social-political framework, and so therefore are psychological problems. Likewise, some psychoanalysts suggest that while psychoanalysis emphasizes environmental causes and reactions, it also attributes the problems of individuals to internal conflicts stemming from early psychosocial development, effectively divorcing them from the wider ongoing context. Slavoj Zizek (drawing on Herbert Marcuse, Michel Foucault,