Excerpt from The History of the Rise, Progress, and Accomplishment of the Abolition of the African Slave-Trade by the British Parliament
Quently inculcated benevolence, we have no reason to conclude from any facts they have left us, that persons in their days did any thing more than occasionally relieve an un fortunate object, who might present himself before them, or that, however they might deplore the existence of public evils among them, they joined in associations for their suppression, or that they carried their cha rity, as bodies of men, into other kingdoms. To Christianity alone we are indebted for the new and sublime spectacle of seeing men going beyond the bounds of individual usefulness to each other  of seeing them associate for the extirpation of private and public misery  and of seeing them carry their charity, as a united brotherhood, into distant lands And in this wider field of benevolence it would be unjust not to confess, that no country has shone with more true lustre than our own, there being scarcely any case of acknowledged af?iction, for which some of her Christian children have not united in an attempt to provide relief.
Thomas Clarkson was an English abolitionist, and a leading campaigner against the slave trade in the British Empire. He helped found The Society for Effecting the Abolition of the Slave Trade (also known as the Society for the Abolition of the Slave Trade) and helped achieve passage of the Slave Trade Act 1807, which ended British trade in slaves.
He became a pacifist in 1816 and, together with his brother John, was among the twelve founders of the Society for the Promotion of Permanent and Universal Peace.
In his later years, Clarkson campaigned for the abolition of slavery worldwide; it was then concentrated in the Americas. In 1840, he was the key speaker at the Anti-Slavery Society's (today known as Anti-Slavery International) first conference in London which campaigned to end slavery in other countries.