William Wilberforce was a British politician and philanthropist who became the leading voice in the parliamentary campaign to abolish the slave trade. Driven by his deep religious convictions, Wilberforce collaborated with Thomas Clarkson and other abolitionists to gather evidence of the trade's horrors. For 20 years, he introduced anti-slavery motions in Parliament, facing fierce opposition from those with economic interests in the plantations. His persistence finally led to the Slave Trade Act of 1807, which prohibited the slave trade in the British Empire. He continued to fight for the total abolition of slavery itself, a goal achieved with the Slavery Abolition Act of 1833, which passed just three days before his death. Wilberforce's work is cited as a prime example of how moral conviction and persistent political pressure can dismantle deeply entrenched and profitable systems of injustice.