A man sits before a fireplace envisioning the various methods of suicide. Lithograph by Honor矇 Daumier, 1879. Suicide is the act of intentionally causing one's own death. Suicide is often carried out as a result of despair, the cause of which is frequently attributed to a mental disorder such as depression, bipolar disorder, schizophrenia, borderline personality disorder, alcoholism, or drug abuse. Stress factors such as financial difficulties or troubles with interpersonal relationships often play a role. The most commonly used method of suicide varies by country and is partly related to availability. Common methods include: hanging, pesticide poisoning, and firearms. Around 800,000 to a million people die by suicide every year, making it the 10th leading cause of death worldwide.