In the context of The Slave Ship, analyze the J. M. W. Turner of the Background.

J.M.W. Turner was a well-known 19th-century landscape painter born in London in 1775, who was highly regarded for his stylistic innovation. His training in the arts was extensive. He started studying at the Royal Academy at the age of fourteen, and gained additional experience in topographical drawings and watercolor working under Dr. Thomas Monro, a physician and alienist, developing his interest in landscapes and distinctive application of colors.Due to his liberal beliefs and interest in current events, Turner was directly exposed to the campaigns and publications of the anti-slavery societies of his time, the Society for the Mitigation and Gradual Abolition of Slavery Throughout the British Dominions (1823–1838) and the British and Foreign Anti-Slavery Society (founded 1839), which inevitably shaped his abolitionist beliefs. As an abolitionist, Turner was passionate about contributing to the slavery resistance campaigns in international regions, such as in the United States. The first documented sign of Turner's artistic contribution to the anti-slavery movement occurred in 1828 when he dedicated an engraving of his painting The Deluge to a well known abolitionist, John Joshua Proby. Twelve years later, after possibly being informed about the Zong incident from reading The History and Abolition of the Slave Trade by Thomas Clarkson, as well as the Amistad rebellion and subsequent court case in the United States which was international news, Turner was inspired to depict these horrific events in his piece The Slave Ship.
Thomas Clarkson British and Foreign Anti-Slavery Society John Joshua Proby Zong Society for the Mitigation and Gradual Abolition of Slavery Throughout the British Dominions J. M. W. Turner