Description Throughout century XIV dC/H century VIII, the waves of the swept plague of Asia Central and decimated the populations from China to Iceland. So devastating it was the Black death through Old World that some historians have compared their effects to those of holocausto nuclear. As the countries began to recover of the plague during the following century, it rose to forts resistances between the East, where it was dropped in the long term societies of the economic and social crisis, and the west, where the technological and social innovation, established the scene for the dominion of Europe in century XX century. Why there are such opposed results of the same catastrophe? In contrast to previous studies that have analyzed the differences between the Islam and the Christianity for the solution of the puzzle, this pioneering work proposes that the system of a country of the certain Earth possession mainly of how it recovered satisfactorily of the calamity of the Black death. Stuart Borsch compares the specific cases of Egypt and England, countries whose economies are based on the agriculture and whose pre-plague of the total levels and agrarian gross internal product were approximately equivalent. The accomplishment of an exhaustive analysis of the Average Age the economic data, that explains of convincing form why centralized Egypt and urban system of possession of the Earth was incapable to adapt to a great depopulation, system of possession of the Earth, whereas England and rural located had recovered totally for year 1500.