>My feeling is that most people who commit suicide do it because they decided it on a rational basis. Some people commit suicide because they want to stop a pain they feel and in their view will apparently last forever or will get worse. I.e cancer, someone has to spend the rest of his life in a bed after an accident ... People can also commit suicide as a sacrifice to save others. But I guess you were not talking of these types of suicide.

You think that more people commit suicide for others than for themselves? Care to explain why or cite anything?

>Suicide due to mental instability is probably just a small fraction of all suicide.

Cite?