âA British abolition movement led by William Wilberforce and Thomas Clarkson raised awareness about the conditions of slavery and pushed the bill through parliament. â The British public signed petitions and boycotted sugar to support the movement. â Some historians argue that the trade became less profitable (although this is debated by historians) and so was no longer required.â The enslaved consistently resisted slavery (including in a revolution in Haiti) which made it challenging to continue.â