Seems to me that the failure of the global system is not so much the result of interlocked economies as that the political systems around the globe all bought into the same model. One could run a "use gold as currency" or "use Euro as currency" or "prohibit interest" or your own favorite economic model for one country even whilst interacting with others...
I think future generations will be laughing at us(*), who think our systems are the be all and end all. Fukuyama indeed.
(*) They always do. -- $E(X_t|F_s) = X_s,\quad t > s$
