What EXACTLY are these inalienable rights?
Impossible to list them all, which is why the Constitution does not attempt to do so. What it does say is that no government can grant or take away these rights we're all born with.
Kings were in favor of granting rights to those he favored. Didn't work out so well.
The concept of "no Government can grant or take these rights away" -
Became a concept, when they declared it so.
How did they arrive at said concept?
Come on - I was challenged and I would like to have a reasoned discussion instead of a sideswipe.