Preface
In the universe there is only one Earth, the shared home of humanity. Unfortunately, this planet on which we rely for our subsistence is facing immense and unprecedented crises, both known and unknown, both foreseeable and unforeseeable. Whether human civilization can survive these has become an existential issue that must be squarely faced. More and more people have come to the realization that rather than amassing material wealth, the most pressing task is to find a guiding beacon for the sustainable development of human civilization, because we all care about our future.
