The advances were many. However, one can't date the beginning of the end of slavery even in England proper to any earlier than 1772. The advances that underpin

The advances were many. However, one can't date the beginning of the end of slavery even in England proper to any earlier than 1772. The advances that underpinned the Industrial Revolution were in place by that time, including the Newcomen steam engine - 1712. It's true that only ten percent at most of England's population were slaves in the Dark to Middle Ages but the rest were Villians/Villeins (serfs), tied to land. It was actually the simultaneous agricultural revolution that made labor cheap because it made vegetables cheap. This revolution had little to do with machinery, with the exception of Tull's horse-drawn seed drill. (Admittedly, a big exception.)