What were the ultimate reasons for the triangular trade involving slaves?

sugar,alcohol/rum and slaves who will do any task that one demands of them!!!!who needs a reason for that???if all things were equal as they were in africa blacks enslaved blacks for the great value that they saw in the equation themselves!!!gods!!to have all your work done by friday!!and then you don't have to pay him!!i've gone unpaid many times for all of my labors on peoples behalf's,i've been cheated and robbed,lied to and cozened by businessmen in america until i can't make a living working!!!!slavery wasn't ever good but at the least you were fed and housed and allowed to breed more slaves!! a freeman today has it alot harder in many ways!!zero population clinics want to sterilize everybody but the rockafellerswho fund the eugenically oriented organization of racists and robber barons!!!try to just build a house for yourself lately!!!the most common of human propensities has been made an impossibility..and tell me that you're free!!!this system needs an enema!!!try to drive your own horse and cart down a road lately to market without getting waylaide by some knight errrant claiming the cart is his to seize and sell at will because you haven't paid this license or that to own what you're allowed to by someone that you've never met???and you think you're free!!please!!!