Suicide is a devastating public health problem, afflicting individuals, families, and societies. Fortunately, continuous striving by the World Health Organization to strengthen suicide prevention efforts is paying off. The annual number of suicide deaths decreased from 1 million to 800,000 worldwide during recent decades. A gloomy exception to this trend is the increasing rate of suicide in the United States (14.0 per 100,000 in 2017). But Denmark's experience offers some hope that prevention of suicide is possible. Why has its decline in suicide been steeper than in most other countries?