However, there are exceptions for warfare and self-defence.
There are also examples in the bible where the sacrifice of life is considered moral ('greater love has no man than this: That a man lay down his life for his friends' John ).
In his book Utopia (1516), More argued that when a patient suffers 'a torturing and lingering pain, so that there is no hope, either of recovery or ease, they may choose rather to die, since they cannot live but in much misery'.
It is an opportunity to end needless suffering, one that we already offer to animals, thus should be offered to humans.
For example, someone chooses death because they have been diagnosed with a fatal, incurable and painful illness.