Why is it illegal to commit suicide?

Ethical Beliefs: Most of the laws about suicide derived from ethical or spiritual beliefs. These laws go back at least as far as greek culture. In modern times they derive from the idea that only god can decide when a person dies. They are designed to discourage suicide. What their actual effects are is unknown.

No....: It is not illegal to commit suicide in the usa. However, if you are considered a suicde risk or have made an attempt to take our own life you may be involuntarily admitted to a psychiatric hospital for your own safety and urgent psychiatric treatment.

Suicide: By legal definition as well as social moral and ethical codes, suicide is though of as either irrational and/or immoral, hence its illegality. Different cultures have different views on this.