Had an idea for an alternative history story and was wondering if it's been tried before. Basically, the British suppress the rebellion in the American colonies and install Benedict Arnold as Viceroy. Slavery is abolished in 1835, as it was throughout the Empire in our world. There is no Civil War, hence no demand for large-scale manufacture of small arms, no culture of gun-ownership, no ascendancy of gangsterism, no bitter and enduring rifts between northern and southern states. That's about as far as I've got. Ring any bells?