Many leaders have created spectacular projects but forgotten to prepare their successors. This was a fundamental mistake.

Alexander of Macedon had already conquered vast territories, but his empire died with his death. I could name many other names.

The greatness of man seems to lie in the fact that he realizes his mortality and bequeaths the continuation of his work to a suitable successor.

In the Roman Empire, for example, we speak of the time of adoptive emperors. During his lifetime, the emperor chose a suitable successor and prepared him to rule. It was a happy time for Rome.