Manslaughter is simply a murder in mistake

That is an error.

Also, manslaughter can be a mistake,

Because humans can make mistakes.

Our intention via our laws and societies is to NOT kill.

Hence manslaughter.

And by definition manslaughter is an error.

Whoa whoa

our intentions does allow us to kill

Whereas nature does not have any such intention.

It is only by our social's morals

And if our intentions are to kill,

That we choose who we get to kill

It isn't manslaughter,

It's murder, which isn't a mistake,

Or it's war.

Is abortion a mistake then?

That depends.

Did you intend to have an abortion?

Is doctor-assisted suicide a mistake?

If yes, then no. If no, then yes.

Is the death penalty a mistake?

That's the real question

The most neutral decision you can do

Again.

is to throw away these morals

It's based on intention.

Become based

If you intend to do something,

But that doesn't end up as the result,

It's a mistake.

No one intends on executing people by the State ofc

Except in many cases they do.

"rarely"

Saudi Arabia intends to kill people for various crimes,

So they do.

in the modern world the death penalty exist

but has rarely been practiced

last time my State did it was like in 2013

and we killed like 13 people over 40 years

anyway offtopic