Why was this important to European countries that had already industrialized?​

Major economic change was spurred by western Europe’s tremendous population growth during the late 18th century, extending well into the 19th century itself. Between 1750 and 1800, the populations of major countries increased between 50 and 100 percent, chiefly as a result of the use of new food crops (such as the potato) and a temporary decline in epidemic disease. Population growth of this magnitude compelled change.