- Why did everyone start to hate the Russians if the U.S. did the same thing in Afghanistan, Iraq?
- What needs to be corrected in the management of Russia first?
- Why did Blaise Pascal become a religious man at the end of his life?
- How do I know if a guy likes you?
- When they say "one generation", how many do they mean?
The French existentialist philosopher Albert Camus considered suicide the main problem of philosophy. To begin with, you can read his essay “The Myth of Sisyphus”.
It is not entirely clear what exactly you are interested in in this question. If you want to know what points of view there are on the consequences of suicide for the “afterlife” – most religions give peculiar answers. Philosophical teachings also sometimes dwell on this issue – existentialists like Camus and Sartre paid a lot of attention to suicide.
Regarding the phenomenon of suicide, psychology has a huge body of knowledge, its mechanisms are described, and all common suicidal and anti-suicidal personality factors are listed. Psychiatry can also partially justify suicidal tendencies in one or another sick individual. Thus, I do not see anything absolutely incomprehensible in suicide.