The 18th century lasted from January 1, 1701 (MDCCI) to December 31, 1800 (MDCCC). During the 18th century, elements of Enlightenment thinking culminated in the American, French, and Haitian revolutions. During the century, slave trading and human trafficking expanded on a global scale. Revolutions began to challenge the legitimacy of monarchical and aristocratic power structures, including the structures and beliefs that supported the slave trade. The British Industrial Revolution began, leading to radical changes in human society and the environment.