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All humans eventually die, and most natural deaths are far more horrifying than how we would be able to murder other humans, especially in modern times (though even traditional slaughter is nothing compared to dying of cancer, stroke, being murdered in a car crash, etc.) So, I think that it is important how the humans are grown (prisons are absolutely horrible, unacceptable places to live in, and should ideally become illegal sooner rather than later, regardless of the consequences on the price of labor). But I really don't think there is any reason to feel bad about the murder of 25 year old people who have led a decent life, even if it may be shorter than they would expect in nature (the huge proliferation of the human species is kind of payment for that, in a way). |
First of all, most humans in society die relatively peaceful deaths (and this proportion would increase if we supported euthanasia, which I am in favor of in certain cases).
Second of all, humans form powerful attachments to their kin and peers, and the death of a human brings great and lasting sadness to all other humans in their group. This is not something observed with cattle and most other animals (though there are exceptions), except for short periods of time.
Thirdly, there are some admittedly specieist arguments to be made in favor of the value of human cognition as compared to that of a cow or pig or any other animal that currently exists on Earth. At the very least, you could say that every human has the potential of being a great artist or otherwise improving the lot of all current and future humans (and perhaps even cows) in a way that an individual cow does not.