If the slave's trade had been banned in the beginning then the economic development of the nation might have been slowing down in the eastern and the western shores of the new and old world.
As a result of the triangular trade the Europe and the North America would have not taken place and as a result of this trade routes not flourish and the development of the naval bases could not have taken place.
Hi! If slave trade was banned, different races would have different relations among themselves and racism could have possibly been less common. The economy also would not have as much cotton produced because most workers used slaves. I hope this helps!