Because many of the delegates saw the president as a king and during the War for Independence" nobody liked King George and the guys who opposed the presidential position as a trade off from one king to another.
The Constitutional Convention happened in 1787 in Philadelphia. The intent of the convention was to establish the U.S. Constitution. Each state, regardless of its number of delegates had a single vote. Thirty-nine of the fifty-five delegates supported the adoption of the new Constitution. Rhode Island was against the Convention and therefore sent no representation.
Of the present delegates, the 16 representatives who refused to sign the Constitution were:
Oliver Ellsworth - Connecticut
William Houstoun - Georgia
William L. Pierce - Georgia
Luther Martin - Maryland
John F Mercer - Maryland
Elbridge Gerry - Massachusetts
Caleb Strong - Massachusetts
William C. Houston - New Hampshire
John Lansing Jr - New York
Robert Yates - New York
William R Davie - North Carolina
Alexander Martin - North Carolina
George Mason - Virginia
James McClurg - Virginia
Edmund J. Randolph - Virginia
George Wythe - Virginia
Ancient Egypt, because it the unification by King Menes and the building of monumental pyramids and temples and last but not least the effective system of medicine.
gathering data on how many veterans lack proper health care and publicizing it on social media