The term can be applied either to the ending of slavery, or to the ending of the slave trade, but in British historical writing the former is more usually referred to as emancipation.
While there are earlier examples of individuals who had doubts about the legality or morality of both the slave trade and slavery, serious public questioning of these institutions only began in Britain in the third quarter of the 18th century, with the attention focused on legal cases such as those of Jonathan Strong and James Somerset (see Somerset case). The first group of people who collectively questioned the legitimacy of the slave trade were the Quakers, who formed a Committee on the Slave Trade in 1783 and were also prominent in the Committee for the Abolition of the Slave Trade also referred to as the Society for the Abolition of the ...