Deaths among the Atani

[Artanis]

What is a natural death for the Atani?

We know about the Númenorean kings of old, who at old age gracefully resigned from their duties and passed the sceptre on to the next generation, and then lied themselves down to die. They had finished their task in Arda and it was time for them to leave. Aragorn too followed this tradition when his reign in Gondor had come to an end. I would say that this is indeed a natural death for a Man in Tolkien's world, as opposed to striving to stay alive as long as the physical body is able.

Under which circumstances is it possible for one of the Atani to die by will?

Again, it seems that Men were able to die wilfully at old age. But there is at least one known person who died a seemingly wilful death when still young: RÃ*an, wife of Huor, who gave birth to her son Tuor, and afterwards went forth into the wild to die. As I see it, she did not want to live anymore when she learned that her husband was slain in the Nirnaeth. But was this death natural? Was it a fault in her, not wanting to proceed with her life? Is it an option for all of Men, to die peacefully of free choice when life seems unbearable, even if your mind and body would be strong and healthy still for many years? If this is true, why then did Túrin have to cast himself upon his sword in order to end his life, and why did Nienor have to cast herself in the river Teiglin?