I was once asked in an interview 'What would you change in the world if you had the power to do so?' I replied that 'if there was no life after death, I would destroy the human race including myself and my family, thus preventing the suffering every human would have undergone if they were alive'. Aside from life after death, at first glance you might think of me as a satanic human being, but I am exactly the contrary, I am a medical student. It would cause temporary suffering but it would also banish endless suffering as well as happy things. My question is that is it ethical and moral to do so?

This strikes me as a particularly easy question. The answer is no.

Among other things, you seem to be making two assumptions. The first is that the suffering prevented by destroying everyone outweighs all the the happiness and satisfaction that would also be prevented. That's already pretty unobvious. But in fact, as you've stated your view, you'd even be justified in wiping out people who would get more satisfaction than suffering out of their lives, since I assume that "everyone" means "everyone." I don't see a scintilla of justification for that.

The more serious problem is in assuming that because this is how you see things, it would justify wiping everyone out, no matter what their view of the matter might be. That's a pretty extraordinary thing to assume. I'm not about to accuse you of being satanic. But the view you're offering might deserve that label.

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