Emile Durkheim (1858 - 1917) was a renowned French philosopher. He presented the Theory of Suicide’ in his book titled Le Suicide (The Suicide) in 1897. It is generally viewed as the first scientific study in the realm of social sciences because it was based on systematic procedures of inquiry. To explore the motives and typology of suicide, Durkheim analysed statistical records of suicide which were available in government organizations such as hospitals at that time.

Durkheim defined suicide as follows:

"Every death resulting directly or indirectly from a positive or negative act of the victim himself, which he knows will produce this result."

This definition has two components 1) Knowledge about the result, and 2) Death caused directly or indirectly by positive or negative action.

1. Knowledge about the result: The person is aware of the result of his action that it would lead to his death. The point to understand here is that the intention of the person may or may not be to kill his own self, but he must know that his action will result in his death. For instance, the intention of a suicide bomber is not self-destruction but to kill others. He simply uses his body as a weapon to kill others. However, since he knows that this action would also lead to his own death, such a death qualifies for being called suicide. 
2. Death caused directly or indirectly from a positive or negative action:
   Positive actions are those actions that result in ending one’s life directly such as hanging, taking poison or a huge quantity of sedatives, shooting one’s own self.
   Negative actions are those actions that result in killing one’s own self indirectly such as by not eating food for a long time to starve oneself to death, by not fleeing out of a building which is on fire.

Durkheim believed that the real causes of suicide are social factors. Therefore, he rejected explanations for suicide from other sciences such as Biology and Psychology. He argued that biological and psychological causes do not offer sufficient explanation for suicide. 

He was of the view that suicide has social causes which are the forces in the social context where a person commits suicide. Like any other human behaviour, suicidal behaviour is also influenced and shaped by the contextual social circumstances of a person. Therefore, the motives for suicide can only be understood and explained with the reference to the social context where it occurs. Therefore, he isolated two variables (as indicators of circumstances in the social context) to explain suicide and its types. 

These two variables are 1) social integration, and 2) social regulation.

1. Integration: Integration means the degree of attachment of an individual to others in society. It can be understood as the degree to which collective sentiments (e.g., knowledge, beliefs, and values) are shared by members of society.
2. Regulation: Regulation is the degree of external constraints on people in a social context. These can be norms and values or other specific external factors which exert some force on an individual and thus, shape their behavior accordingly.

The main assumption of Durkheim’s theory is that both the highest as well as the lowest degree of integration or regulation makes a person susceptible to suicide. If an individual is not properly integrated into society, it makes him vulnerable to suicide. Likewise, if an individual is highly integrated into society, it makes him susceptible to suicide. The same applies to the degree of regulation in making an individual vulnerable to suicide. Based on these explanations of the two variables (integration and regulation), Durkheim divided suicide into the following four types.

1. Egoistic Suicide
2. Altruistic Suicide
3. Anomic Suicide
4. Fatalistic Suicide

Egoistic suicide is caused by the lack of integration of an individual in his group. If an individual is weakly integrated into his social group, it will make him prone to suicide. Such a suicide is a result of extreme loneliness and high individualism. The term ‘Ego’ refers to self. Egoistic people are highly self-focused and introverted. They have the tendency to detach themselves from mainstream society by shutting themselves up within themselves. They do not participate in social life. They have no interest in social gatherings and usually cut off ties with others.

Such an individual feels affronted, lonely, hurt, ignored and unwanted. They have introvertial traits and prefer living alone. They get alienated and find it difficult to cope with their social alienation which leads to suicidal behavior.

This kind of suicide, which is a product of weak integration of an individual in their social group, was based on Durkheim’s findings of the relationship between the rate of suicide and varying degrees of individual's integration in family, religious group and other areas, as explained below:

Family.

‘Suicide rates are higher in singles (unmarried, divorced or separated) than married ones. Similarly, suicide rates are higher in married couples having no child than those having children’.

Since married people have higher integration (as attached to wife and children) in their groups than single people (unmarried or separated), the suicide rate is comparatively higher among single people. Similarly, married couples with children have higher integration (in their familial group) than couples with no children, the suicide rate is relatively higher in couples with no children.

Religion

“The suicide rate in Protestants is relatively higher than in Catholics.”

Durkheim argued that Catholicism promotes group integration by encouraging its followers to develop strong social ties with one another. By contrast, Protestantism fosters the spirit of individual freedom and have fewer beliefs and practices which may integrate its followers in society. For these reasons, the rate of suicide is higher in Protestants than in Catholics.

Education

“The suicide rate is higher in more-educated individuals than in less-educated individuals.”

Durkheim believed that education makes an individual more critical about things, and is thus likely to result in weakening their social bonds. Therefore, educated people were more susceptible to suicide. He also viewed this as a cause of the higher suicide rate in Protestants because Protestants were more educated than Catholics (at that time).

Durkheim also observed that “Suicide rate is higher in men than in women”. He supported this observation by stating that since men were more educated than women (at that time), they were relatively more prone to suicide.

Altruistic suicide is a result of over integration of an individual into his social group. It is the opposite of Egoistic suicide. When an individual is highly integrated into his group, he becomes ready for the sacrifice of his life for the collective uplift and interest of his group. Due to higher integration in his group, the aim of the group becomes dearer to him than his personal benefit. This type of suicide is generally associated with high respect in the eyes of the members of the group. 

Due to over-integration, the individual loses sight of his individuality and only sees the welfare of his group which can be a community, a nation, a political group, a religious group or any other group. Therefore, the individual takes it as his duty to commit suicide for the sake of his group when needed.

Examples.

1. Soldiers killed by the enemy soldiers in a war. Soldiers are ready to die while fighting for the sake of their country or nation.
2. Japanese illustrated this type of suicide, known as Hara-kiri or Seppuku, in past. In this practice, they took their own lives in order to prevent bringing shame to their groups because of their offensive actions or losing at war; and thus, to safeguard the social unity of their groups.   
3. People in North India practised Sati in the past where a widow would kill herself in the burning ashes of the dead body of her husband. This practice of a widow was highly revered by the member of the community.
4. The suicide bombers who kill themselves to kill others supposedly for cause of their group.
5. Parents getting hit by a car while pushing their child from the path of a car rushing with high speed towards their child.

Durkheim divided altruistic suicide into three types: obligatory, optional and acute altruistic suicide.

Obligatory Altruistic Suicide: It is altruistic suicide that is socially or culturally obligatory on the individual. This kind of suicide is respected in societies and thus obligates them commit suicide when needed. The practice of ‘Sati’ in Hindu society in past is an example.

Optional Altruistic Suicide: It is altruistic suicide that is not obligatory but optional for the individual. For instance, a soldier killed in a battle had an option to become a soldier or adopt any other profession.

Acute Altruistic Suicide: It is also called mystical suicide – because it is based on mystical beliefs. For instance, a belief in some religions is that a person will receive a glorious place in the spiritual realm after his death if he dies for sake of a communal cause. Similarly, Hindus jumping into Ganga (a river) with the belief that it will wash away their sins and will purify their souls.

Anomic suicide occurs as a result of low regulation by social norms in a society. The term ‘anomie’ means the ‘state of normlessness’. It happens when social norms or external forces of social control fail to exercise constraints on individuals to mold their behaviors according to the expectations of society. It can also happen as a result of abrupt and rapid social changes when the old norms fail to work, and the new norms have not yet started operating.

Such a state of normlessness leads to social chaos. The individual is confused about how to behave, where to go, how to come up to the expectations of society or how to influence the social environment according to their own wishes. Due to weak regulatory functions of the norms, human behavior becomes dysfunctional, and society is threatened with disorganization and disintegration. Social relationships are shattered because both personal and social ethics fail to perform their regulatory function. It changes the outlook of some individuals negatively. People start to feel confused, insecure and unsatisfied which collectively makes them susceptible to anomic suicide.

The main point of this type of suicide is that due to an anomic situation, the individual finds it hard to adjust himself to an anomic (normless) situation and thus, commits suicide. Such anomic situation can be a result of sudden changes at the societal level as well as at the individual level. For instance, at the individual level, when a very rich person loses his everything suddenly, he may commit suicide because he is unable to adjust himself to this unexpected sudden change in his life. Durkheim called it economic anomie.

Similarly, some people may commit suicide as a result of the sudden death, divorce or separation of their spouse. Durkheim called it conjugal anomie.

Fatalistic suicide occurs as a result of over-regulation. It is the opposite of anomic suicide. There are norms and other external factors which exert regulatory pressure on an individual. When they exert excessive regulation over an individual, the situation becomes un-tolerable for him. In such an oppressive and restrictive situation, he loses hope for any positive change in his life. Due to overregulation, the individual feels powerless to change the oppressive circumstances and thus, prefers to die rather than continue living in such a restrictive situation. These oppressive circumstances compel the individual to end his own life.

Examples.

1. Prisoners committing suicide in Jails (Prisoners sometimes prefer to die than to live in a prison with constant and excessive regulation on them that prohibits them from pursuing their desires.)
2. Slaves (under cruel masters) who commit suicide.
3. Barren (infertile) women committing suicide in some cultures where childless women may face constant humiliation at the hands of their in-laws.