In the twentieth and twenty-first centuries, the powers of presidencies have varied from country to country. The spectrum of power has included presidents-for-life and hereditary presidencies to ceremonial heads of state.
== Presidential timeline ==
*1640 - [[Henry Dunster]] succeeds [[Nathaniel Eaton]] as the head of [[Harvard College]]. He creates for himself the title of [[...|President of Harvard]].
*1774 - The American [[Continental Congress]] elects [[Peyton Randolph]] as its first . Thirteen other men will serve in the mostly ceremonial role over the next fourteen years.
*1787 - The [[United States Constitution]] creates the office of [[President of the United States]], the chief executive of the [[...|federal government]].