<P> Among the most controversial issues confronting the delegates was that of slavery . Slavery was widespread in the states at the time of the Convention . At least a third of the Convention's 55 delegates owned slaves, including all of the delegates from Virginia and South Carolina . Slaves comprised approximately one - fifth of the population of the states; and apart from northernmost New England, where slavery had largely been eliminated, slaves lived throughout all regions of the country . The majority of the slaves (more than 90%), however, lived in the South, where approximately 1 in 3 families owned slaves (in the largest and wealthiest state, Virginia, that figure was nearly 1 in 2 families). The entire agrarian economy of the South was based on slave labor, and the Southern delegates to the Convention were unwilling to accept any proposals that they believed would threaten the institution . </P> <P> Whether slavery was to be regulated under the new Constitution was a matter of such intense conflict between the North and South that several Southern states refused to join the Union if slavery were not to be allowed . Delegates opposed to slavery were forced to yield in their demands that slavery practiced within the confines of the new nation be completely outlawed . However, they continued to argue that the Constitution should prohibit the states from participating in the international slave trade, including in the importation of new slaves from Africa and the export of slaves to other countries . The Convention postponed making a final decision on the international slave trade until late in the deliberations because of the contentious nature of the issue . During the Convention's late July recess, the Committee of Detail had inserted language that would prohibit the federal government from attempting to ban international slave trading and from imposing taxes on the purchase or sale of slaves . The Convention could not agree on these provisions when the subject came up again in late August, so they referred the matter to an eleven - member committee for further discussion . This committee helped work out a compromise: Congress would have the power to ban the international slave trade, but not for another twenty years (that is, not until 1808). In exchange for this concession, the federal government's power to regulate foreign commerce would be strengthened by provisions that allowed for taxation of slave trades in the international market and that reduced the requirement for passage of navigation acts from two - thirds majorities of both houses of Congress to simple majorities . </P> <P> Another contentious slavery - related question was whether slaves would be counted as part of the population in determining representation of the states in the Congress, or would instead be considered property and as such not be considered for purposes of representation . Delegates from states with a large population of slaves argued that slaves should be considered persons in determining representation, but as property if the new government were to levy taxes on the states on the basis of population . Delegates from states where slavery had become rare argued that slaves should be included in taxation, but not in determining representation . Finally, delegate James Wilson proposed the Three - Fifths Compromise . This was eventually adopted by the Convention . </P> <P> The states had originally appointed seventy representatives to the Convention, but a number of the appointees did not accept or could not attend, leaving fifty - five delegates who would ultimately craft the Constitution . </P>

What was the federal compromise at the constitutional convention