> That means the modern society is not sustainable and cannot adapt to long-term changes.
Why? I, as the poster you replied to, do not see it this way at all. Any society, modern or not, can adapt to slow changes. And rapid changes would be at least as damaging several centuries ago, when for example 2-3 consecutive years of bad harvests meant a major upheaval.
Things can look a lot smoother after a few centuries. My 2c.