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Corey is right. There are monks who can slow and nearly stop their own heartbeats. It takes them an entire lifetime of practice.
So if you want to control bodily functions. Start by mastering meditation and some yoga, then maybe look around for some communities interested in it. (Or move in with Tibetan monks).
By definition, if they are involuntary we cannot control them.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.