Clarkson, Thomas: - Thomas Clarkson was an English abolitionist who died on September 26, 1846. He was born on March 28, 1760, and died on September 26, 1846. He helped start an organization called the Society for Effecting the Abolition of the Slave Trade, which is also known as the Society for the Abolition of the Slave Trade. He also worked to get the Slave Trade Act of 1807 passed, which put an end to the British slave trade. He stopped fighting in 1816 and was one of the twelve people who started the Society for the Promotion of Permanent and Universal Peace with his brother John. In his later years, Clarkson worked to end slavery all over the world. In 1840, he gave the most important speech at the first meeting of the British and Foreign Anti-Slavery Society in London. This group worked to end slavery in other countries. He was made a deacon in 1783, but he never went on to become a priest.