What is the cause of fratricide?

There are many possible causes of fratricide, including:

- Genetics: Some studies have suggested that there may be a genetic component to fratricide. For example, one study found that men with a certain gene variant were more likely to commit fratricide than men without the gene variant.

- Maternal age: Some studies have also found that the risk of fratricide is higher when the mother is older. For example, one study found that the risk of fratricide was nearly three times higher for women over the age of 35 than for women under the age of 25.

- Birth order: Some studies have found that the risk of fratricide is higher for firstborn children and for children born close together in age. For example, one study found that the risk of fratricide was nearly four times higher for firstborn children than for later-born children.

- Family dynamics: Some studies have also found that the risk of fratricide is higher in families with a history of violence, child abuse, or neglect. For example, one study found that the risk of fratricide was nearly seven times higher in families with a history of violence than in families without a history of violence.

- Socioeconomic status: Some studies have also found that the risk of fratricide is higher in low-income families and in families living in urban areas. For example, one study found that the risk of fratricide was nearly three times higher for families living in poverty than for families living above the poverty line.

It is important to note that fratricide is a complex issue and that there is no single cause. Rather, it is likely that a combination of factors contribute to the risk of fratricide.