Religious ideologies have never answered these questions either.<p>Just because we have not yet answered these questions in a scientific manner does not mean that we cannot.  But religion, being absolutist, cannot evolve in a way that scientific understanding can.  A religion that evolves is a religion that was false to begin with.<p>Suicide and depression are largely a result of over diagnosis, which is to be expected when incentives align that way in a capitalist system.<p>The world is much, much more complex than you understand it to be.