Another tragic cause of suicide, and one that families need to take heed of, is revenge. People feel abandoned, unloved, like their family doesn't care about them anymore, or a family member disappointed them or let them down. I've heard of may cases where they will commit suicide, sometimes in front of the family member(s), who they feel wronged them, just so they will feel bad, guilty, ashamed for the rest of their lives. I think in some cases people kill themselves because their family doesn't listen or hear them, and suicide is a way for them to get their attention or make themselves be heard.