Samuel Slater has been called the world’s first industrial spy, the Ark-wright of America, the Father of American manufacturers, and the architect of America’s Industrial Revolution. He established the first successful spinning mill in America, the prototype for hundreds of factories later constructed throughout New England. His significance, however, was not limited to machine and mill construction. He instituted the family system of labor and the Sunday School, and his son Horatio Nelson Slater would take the family firm to a dominant position in the textile industry. Yet he did not work alone. Throughout most of his career in America, he was assisted by his younger brother John Slater who organized the first factory town in an attempt to merge Jeffersonian pastoral values and the new industrialism, introduced mule spinning to America, argued for the use of the power loom, and was the father of John Fox Slater, one of the most important philanthropists in the nineteenth century. Together the two brothers owned factories in four states and represented the first of several generations of Slaters who dramatically impacted the future of the new nation.