Maybe understanding the root cause of suicidal feelings will help people avoid suicidal feelings. I have had them myself. My attempt was drinking a whole bottle of Gin hoping not to wake up the next day. I did wake up the next day feeling like shit, nastiest hangover of my life. That was 3 years ago. I think feeling suicidal is not a decision one makes immediately, its a series of events that leads you to that point. I've narrowed it down to. Hormones in the brain that make you feel good like dopamine. I mean think about it. Whenever you feel suicidal happens to be the same time everything seems to be going wrong in your life. You've just reached your limit, even though rationally speaking there's a way you could turn your situation around(except for terminal illness and disability). Everything we do on a daily basis is geared towards feeling good. The selection of food, friends, career, conversations. We normally want to do something which makes us happy whether consciously or subconsciously. I think if the level of that hormone becomes lower each time we go through a difficult situation depending on the magnitude of the situation then eventually you feel just shitty enough to end it all.