you try to put together a set of rules in which all the things we've talked about before, noticed, skimpily, currency, cannot be observed because you do more complicated set of entitlements. now, the last thing that this thing does is it sets up a framework for contract. the understanding about the classical legal system, what we do a most strange is how this relatively low skill set of obligations. but what we had to do amongst people with whom they wish to trade is to form deeper obligations. the great geniuses, the more complicated society becomes, with respect to most transactions, the bigger the market, the greater the number of choices that you want people to deal with, and if you develop relatively weak public institutions for judicial enforcement, what you can do is not let anyone precisely any other person, group or person ever to form these kinds of private relationships. so that by keeping the basic norms very simple, it turns out that you facilitate a situation in which you now have very strong contract. what to these norms produce? they produce games for the individual parties