You are separating the concept of power from law, and thus from your concept of code. This means you are essentially making the same mistake that neoclassical economics does -- assuming that people prefer to engage in mutually beneficial relationships instead of coercive relationships if both options are available. Not even worrying about hegemons, just strong states, or strong military/political authorities are necessary for the widespread adoptions of micro-level, trust based relationships. Why? Because the guy with the gun, or the car bomb, or the army, or the virus, or whatever, has a lot more power to gain by destroying people's trust in one another, i.e., corrupting the code, than he does by leaving it be.  To me, Economy 3.0 seems to be inherently unstable which means it can't happen without the supportive authority of a strong state/military sponsor, just like trade, investment, migration, or any other aspect of globalization need such a sponsor.