So what can you look forward to the day our artificial economy collapses? How are you going to stay alive (i.e., feed yourself)? Will you go to the asphalt jungle and bag yourself a woolly or maybe plant potatoes on your living room carpet? Think of it. You are entirely like a baby, dependent on your local grocery store, which in turn is entirely dependent on the agricultural corporation for the production, manufacturing, and distribution of food. The problem is that the agricultural corporation performs all these services for a profit and not to keep you alive. No profits, no food. It’s just that simple. So what happens to a population that starves? Does it go to the voting booth and fire its politicians? What good will come of this if the politicians can’t remedy the situation? Will political leaders order private corporations running the food supply to put out more food at gunpoint to make it less expensive on the consumer? I mention this because at least one fellow speculates that this may be a solution during hard times:
“ during a famine, doubling the supply of food has large positive externalities because starvation leads to robbery, hunger riots, and even cannibalism. During times of plenty, however, doubling the food supply would probably have no noticeable effect on crime.” 
In worst case scenarios, when order collapses entirely, you can expect people to take matters into their own hands. The record shows that desperate people resort to cannibalism.  
“ The collapse of the productive forces surpassed anything of the kind that history had ever seen. The country and its government were at the very edge of the abyss. Although the Bolsheviks won the Civil War, Russia’s national income had dropped to only one-third and industrial output to less than one-fifth of the prewar levels. By 1921 Moscow had lost half its population; Petrograd, two-thirds… In those areas, 90 to 95 percent of the children under three years old died; surviving children were abandoned as one or both parents died, leaving them starving and homeless. There were incidents of cannibalism.” 
It is important to note that the atrocities happened independently of those committed directly by the politicians. We also must keep in mind that Russia received external aid. It was not a closed economy. Cannibalism was also reported to have happened during the Great Famine of 1315. Perhaps the T-Rex bite marks we see on other T-Rexes are an indication that these creatures resorted to cannibalism when their immediate habitat collapsed.  In some cases, we are perhaps staring at some of the last T-Rexes that ever walked on Earth. Nevertheless, we can expect cannibalism to be widespread when there is nothing left to eat. The very last stage of a mass extinction is necessarily cannibalism. It happens to the best of us. The strong will eat the weak, the father his child, the jailer his prisoner, the doctor his patient. The demographic collapse is exponential. It happens everywhere at the same time.