"Non-cooperative game theory, the original and most widely used branch of game theory, assumes the absence of an external authority to enforce rules. Fundamentally, I claim that the Ethereum ledger constitutes an incorruptible, omnipresent, external overseer that no matter the game is always available to enforce agreements among players. This implies that Ethereum, in theory, could turn any non-cooperative game into a cooperative game (sometimes called a coalitional game)."