Just because it is too late for modern societies to be maintained, does not mean it is too late for influencing the future. Just because it might be too late to significantly influence that future, does not mean it is too late to learn how to participate less in destructive or delusional behaviours.
The Earth is what we all have in common. It is what we are made of and what we live from, and we cannot damage it without damaging those with whom we share it. There is an uncanny resemblance between our behavior toward the earth and our behavior towards people. By some connection we do not recognize, the willingness to exploit one becomes the willingness to exploit the other… It is impossible to care for each other more or differently than we care for the earth.
Wendell Berry