As the 18th century draws to a close, Great Britain has become a major international power through victory over France in the Americas and the colonisation of large parts of India. In England, the Industrial Revolution is taking hold and radically changing both the environment and society. Alongside the spread of the Empire across the globe, the transatlantic trade in slaves also increased dramatically, becoming a very lucrative business for ports such as Bristol and Liverpool. The majority of the enslaved people, stolen from Africa by the British, were sold to the plantations of the European colonies, however, a number were also brought back to Britain to be kept or sold as domestic slaves. By the 1770s, some Christians were beginning to question the morality of the trade. However, the slavers would prove unwilling to give up such a profitable business without a fight.