Couples therapy (also couples' counseling, marriage counseling, or marriage therapy) attempts to improve romantic relationships and resolve interpersonal conflicts. History Marriage counseling originated in Germany in the 1920s as part of the eugenics movement. The first institutes for marriage counselling in the United States began in the 1930s, partly in response to Germany's medically directed, racial purification marriage counselling centres. It was promoted by prominent American eugenicists such as Paul Popenoe, who directed the American Institute of Family Relations until 1976, Robert Latou Dickinson, and by birth control advocates such as Abraham and Hannah Stone who wrote A Marriage Manual in 1935 and were involved with Planned Parenthood. Other founders in the United States include Lena Levine and Margaret Sanger. It wasn't until the 1950s that therapists began treating psychological problems in the context of the family. Relationship counseling as a discrete, professional service is thus a recent phenomenon. Until the late 20th century, the work of relationship counseling was informally fulfilled by close friends, family members, or local religious leaders. Psychiatrists, psychologists, counselors and social workers have historically dealt primarily with individual psychological problems in a medical and psychoanalytic framework. In many less technologically advanced cultures around the world today, the institution of the family, the village or group elders fulfil the role of relationship counseling. Today marriage mentoring mirrors those cultures. With increasing modernization or westernization in many parts of the world and the continuous shift towards isolated nuclear families, the trend is towards trained and accredited relationship counselors or couple therapists. Sometimes volunteers are trained by either the government or social service institutions to help those who are in need of family or marital counseling. Many communities and government departments have their own team of trained voluntary and professional relationship counselors. Similar services are operated by many universities and colleges, sometimes staffed by volunteers from among the student peer group. Some large companies maintain a full-time professional counseling staff to facilitate smoother interactions between corporate employees, and to minimize the negative effects that personal difficulties might have on work performance. Increasingly there is a trend toward professional certification and government registration of these services. This is in part due to the presence of duty of care issues and the consequences of the counselor or therapist's services being provided in a fiduciary relationship. See also alienation of affection. Basic principles It is estimated that nearly 50% of all