Muhammad left Mecca, in 622 CE, after he was warned about a plot to assassinate him. The migration of the Prophet and his followers from Mecca to Medina is known as Hijra or Hegira.
“Several weeks before he [Thomas Jefferson] finished drafting the Declaration of Independence, the people of that town had already made up their minds that they would be free and independent. Long before the men in Philadelphia voted on “this momentous issue, the people of Malden had decided to commit their own lives, fortunes, and sacred honor to the cause of American Independence.”
The Eastern Empire was located on a straight, where it was difficult for invaders to put down the capital's defenses. They also had a powerful administrative center and political stability as well as great wealth. The emperors were able to control over the resources and effectively mobilize manpower to fight invasion.
According to Max Weber protestant ethic was a central factor in the birth of capitalism.
