Considerations of Wise Leaders

We cannot be optimistic superficially but should have a long view. We do not need the foolish idea of “either this or that”. If our expectation of advantage were tempered, we may succeed in accomplishing the essential part of our schemes. If, on the other hand, in the midst of difficulties we are always ready to seize an advantage, we may extricate ourselves from misfortune.
An old saying from Art of War by Sun Zi, a great strategist and sage in ancient China, goes, “Hence in the wise leader’s plans, considerations of advantage and of disadvantage will be blended together”  How to solve the problems caused by population explosion, aging of population，unemployment, foods, energy, resource and etc…?