There will be plenty of people who already know and teach their kids, however, for the masses, they are doomed to repeat history.
Rome was at the highest point of excess and dependence when it fell. The term "bread and circuses" points out that time in Roman history when the leaders tried to hide the upcoming decline by entertaining the masses.
I'm sure there are other examples throughout history in different parts of the world. If we knew more about the Mayans, we might find that they did the same thing before their civilization collapsed.