Who benefited the most from the triangular trade? how did this trade route lead to the establishment of slavery in the americas ?

New England. New England also benefited from the trade, as many merchants from New England, especially the state of Rhode Island, replaced the role of Europe in the triangle. New England also made rum from Caribbean sugar and molasses, which it shipped to Africa as well as within the New World.
It was this transatlantic triangular trade of the 16th century that was responsible for moving ideas, products, and people around the world. Yes, people. This triangulartrade is how European empires filled their colonies with African slaves, starting a legacy of slavery that defined the Americas.