Suicide

III

Methods

Methods of suicide vary from culture to culture. Hanging is the leading method of suicide worldwide. In the United States about 60 percent of all suicides are committed with firearms. In Canada, where guns are less accessible, about 30 percent of suicides are committed with guns. Poisoning, such as taking an overdose of medication, accounts for about 18 percent of U.S. suicides. Researchers believe that a small proportion of fatal single-occupant automobile accidents are actually suicides.

IV

Causes

Suicidal behavior has numerous and complex causes. The biology of the brain, genetics, psychological traits, and social forces all can contribute to suicide. Although people commonly attribute suicide to external circumstances—such as divorce, loss of a job, or failure in school—most experts believe these events are triggers rather than causes in themselves.

The majority of people who kill themselves suffer from depression that is often undiagnosed and untreated. Because depression so often underlies suicide, studying the causes of depression can help scientists understand the causes of suicide (see Depression: Causes). Other mental illnesses, such as bipolar disorder, schizophrenia, and anxiety disorders may also contribute to suicidal behavior.

A

Biological Perspectives

Research indicates that suicidal behavior runs in families, suggesting that genetic and biological factors play a role in one’s suicide risk. Among one community of Amish people in Pennsylvania, almost three-quarters of all suicides that occurred over a 100-year period were in just four families. Studies of twins reared apart provide some support for a genetic influence in suicide.

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People may inherit a genetic predisposition to certain psychiatric disorders, such as schizophrenia and alcoholism, that increase the risk of suicide. In addition, an inability to control impulsive and violent behavior may have biological roots. Research has found lower than normal levels of a substance associated with the brain chemical serotonin in people with impulsive aggressiveness.

B

Psychological Theories

In the early 1900s Austrian psychoanalyst Sigmund Freud developed some of the first psychological theories of suicide. He emphasized the role of hostility turned against the self. American psychiatrist Karl Menninger elaborated on Freud’s ideas. He suggested that all suicides have three interrelated and unconscious dimensions: revenge/hate (a wish to kill), depression/hopelessness (a wish to die), and guilt (a wish to be killed).

An American psychologist considered to be a pioneer in the modern study of suicide, Edwin Schneidman, has described several common characteristics of suicides. These include a sense of unbearable psychological pain, a sense of isolation from others, and the perception that death is the only solution to problems about which one feels hopeless and helpless. Cognitive theorists, who study how people process information, emphasize the role of inflexible thinking or tunnel vision (“life is awful, death is the only alternative”) and an inability to generate solutions to problems. According to psychologists, many suicide attempts are a symbolic cry for help, an effort to reach out and receive attention.

C

Sociological Theories

Most social scientists believe that a society’s structure and values can influence suicide rates. French sociologist Émile Durkheim argued that suicide rates are related to social integration—that is, the degree to which an individual feels part of a larger group. Durkheim found suicide was more likely when a person lacked social bonds or had relationships disrupted through a sudden change in status, such as unemployment. As one example of the significance of social bonds, suicide rates among adults are lower for married people than for divorced, widowed, or single people.

Studies consistently show that although suicidal people do not appear to have greater life stress than others, they lack effective strategies to cope with stress. In addition, they are more likely than others to have had family loss and turmoil, such as the death of a family member, separation or divorce of their parents, or child abuse or neglect. The parents of those who attempt suicide have a greater frequency of mental illness and substance abuse than other parents. However, suicide occurs in all types of families, including those with little apparent turmoil.

Fluctuations in social and economic conditions frequently result in changes in the suicide rate. In the United States, for example, suicide rates declined during World War I (1914-1918) and World War II (1939-1945), when unemployment was low, but increased during the Great Depression of the 1930s, when unemployment was high. Occasionally, people commit suicide as a form of protest against the policies of a particular government. Mass suicides, in which large numbers of people kill themselves at the same time, are extremely rare. The most famous mass suicides occurred in ad 73 at Masada in what is now southern Israel, when 960 Jews killed themselves rather than face enslavement by Roman captors; and in 1978 in Jonestown, Guyana, when more than 900 members committed suicide on the orders of their leader, Jim Jones.

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