[xamolxix]

Magna carta only created rights for the oligarchs of the time, many of which have descents today with the same inherited wealth. You don't have to dig that deeply in the UK society to find the old aristocracy alive and well and still above others and usually the law.

[drcongo]

That's the Magna Carta, OP was talking about the Manga Carta which is presumably a comic book version though I've never come across it.

Also, what you say is very true. The Magna Carta was a hastily cobbled document to protect the power balances and keep the serfs in their place.

[hollerith]

The Magna Carta is celebrated because it was the first written agreement ever that actually did a decent job of protecting the rights of any group.

[kergonath]

There were things like the old Roman laws that defined the rights, privileges, and obligations of Roman citizens. Or the various constitutions of the old Greek poleis, which similarly guaranteed the freedom of the citizens. Or even the Hammurabi code, if you squint a bit.

“A decent job” is subject to interpretation, but I find very difficult to argue that the Magna Carta was the first, even if it was very significant.