By the time of the Constitutional Convention in 1787, slavery in the United States was a widespread reality. In the census of 1790, there were slaves counted in almost every state with the exception of Massachusetts and the districts of Vermont and Maine. The census concluded that of the 3.8 million people that were counted in the United States, 700,000 of them were slaves.
When the Constitutional Convention met, in the 1780's, there was no great movement to abolish slavery. There were opponents of slavery on a philosophical level; however, many Americans believed that slaves were essential for the economy of this new nation to succeed. Prior to the Convention in 1787, many "Founding Fathers" expressed opinions that condemned slavery, however these are the same men who owned slaves themselves.
The Convention had representatives from every corner of the country, including the south, where slavery was most common. Each representative had his own special interests according to the area of the country that he represented, both politically and philosophically. Obviously, these differences of opinion caused a lot of debate during the creation of the Constitution. Compromises had to be made in order for the