Not at the point of the Constitutional Convention since America had already broken away.The delegates at the drafting of the Declaration of Independence thought about that very thing every day.
Every five enslaved persons would count as three free persons. This is known as the Three-Fifths Compromise
No, not every state participated in the Constitutional Convention held in Philadelphia in 1787. While twelve states sent delegates, Rhode Island chose not to attend, fearing that a stronger national government would undermine its sovereignty. The convention ultimately led to the drafting of the U.S. Constitution, which required ratification by all thirteen states.
Hamilton drafted the resolution that led to the assembling of the Constitutional Convention in Philadelphia in 1787. At the convention Hamilton was unable to play a significant role. His desire for a strongly centralized federal government, including a president for life, was not shared by the other convention delegates, and his two fellow delegates from New York were Anti-Federalists who were able to outvote him on every measure. Hamilton then turned his energies to securing the ratification of the Constitution.
James Madison's role at the constitutional convention was to take notes of what every body said.
Except Georgia.
James Madison
The major concern of the delegates was to make a government not too powerful and to still let the states have their independence. Under the Articles of Confederation, the government was too weak. It could not force the states to make their citizens pay taxes. Every state had a different kind of money. And if one state doesn't like a law, that law will not be made.
*** He, along with Alexander Hamilton, was one of the chief writers of the report that would call for the Philadelphia Constitutional Convention, after the failed Annapolis Convention of 1786. *** He wrote 30 of the 85 Federalist Papers (Alexander Hamilton wrote 50, John Jay wrote 5), including Nos. 10 and 51, regarded as two of the most important documents in American history. *** He wrote the Bill of Rights. *** His meticulous notes from the Constitutional Convention tell us what went on and what was discussed; he was one of the few delegates who attended the convention nearly every day.
Delegates would be free to change their minds as new information was presented
Theoretically, every occupation except Priest and Nobleman; in fact, most of the delegates actually eleted were lawyers.
The delegates agreed on the 3 government branches: legislature, executive and judice. They also agreed that every large state gets 1 vote and small states gets 2 votes because of the population of each state.