Anti-Slavery International is the world's oldest human rights organisation. Its roots stretch back to 1787 when the first abolitionist society was formed. The British and Foreign Anti-Slavery Society (BFASS) was officially created on 17 April 1839 to crusade against slavery and the slave trade throughout the world. To this day, the organisation continues the fight against human trafficking, traditional slavery, child prostitution and all forms of forced and bonded labour. This broad-based society was at the forefront of the movements to abolish the slave trade (achieved in Britain in 1807) as well as slavery throughout the British colonies (achieved in 1833). The organisation's early leaders included Sir Thomas Foxwell Buxton, Thomas Clarkson, and other notable Quakers, Baptists, and Methodists.