There are suicidal people who have mental illness, but in my opinion, wanting to take one’s own life is not a mental illness, nor is it necessarily indicative or symptomatic of one. Rather, it is likely a spiritual condition residing at a far point on a spectrum. 30 years ago suicide was as taboo a subject as divorce. Today it is a sign of an imbalance of brain chemistry. 30 years from now it will be regarded as I posted here. Just a guess.