[ben_w]

The winning move for a single round of the Prisoner's Dilemma is to defect.

The winning move for the Iterated Prisoner's Dilemma is tit-for-tat.

Enforcement mechanisms lead actors to behave more cooperatively, and everyone knows everyone is better off if everyone is cooperating.

[Kamq]

That doesn't make anyone in the game not sovereign

[ben_w]

The enforcement mechanism is a voluntary de jure loss of sovereignty, even though the de facto sovereignty to leave the enforcement mechanism remains.

[Kamq]

Ok, that makes more sense