William Wilberforce (1759–1833) was a politician, philanthropist and evangelical Christian, now best known for his work to end the slave trade. Elected to Parliament in 1780, he campaigned unsuccessfully for penal and electoral reform. In 1787, at the encouragement of his friend William Pitt, he took up the cause of abolition at Westminster and lobbied influential people tirelessly, but humanitarian and ethical arguments were slow to overcome the...