the theory works for many kind of surpluses. if there are too many engineers and scientists and not enough jobs for them it's a problem. this also applies to an

the theory works for many kind of surpluses. if there are too many engineers and scientists and not enough jobs for them it's a problem. this also applies to any kind of elites: someone who considers himself above the general population: medieval nobles, roman senators, programmers. too many of them and it's a problem. you can read turchin's scientific articles, he uses data from different societies (widely different) and his equations seem to work to predict instability