无所畏惧每年,全世界有几百万人试图自杀,其中有近100万人自杀成功。在中国,自杀已经成为15～34岁青壮年的首要死因。而由精神疾病导致自杀动机的仅仅是自杀的部分原因。要想结束自己的生命,人们需要有执行自杀计划的决心。这种决心取决于诸多因素,例如冲动、无所畏惧、能够忍受疼痛等。新研究显示无所畏惧是有条件的:有疼痛体验的人,无论是被他人虐待还是自虐,都会逐步提高对不适感的忍受能力,他们通常对自残的念头也习以为常。有时候由酒精或者其他物质导致的较弱的冲动控制能力,也可能会引发自杀行为。美国约翰斯·霍普金斯大学布隆伯格公共卫生学院伤害研究与政 Fearless Every year, millions of people around the world try to commit suicide, of whom nearly 1 million have succeeded in committing suicide. In China, suicide has become the leading cause of death among young adults aged 15 to 34. The cause of suicide by mental illness is only part of the cause of suicide. There is a determination that people will need to implement a suicide plan to end their lives. This determination depends on many factors, such as impulse, fearlessness, painfulness and so on. New research shows that fearlessness is conditional: people with a painful experience, whether abused or self-abusing by others, will gradually increase their ability to endure discomfort, and they are often used to the idea of ​​self-harm. Sometimes weaker impulse control, caused by alcohol or other substances, can also trigger suicide. Johns Hopkins Bloomberg School of Public Health Injury Research and Administration