In the early 19th century the Industrial Revolution was in full swing in Britain, France, and Belgium. The various small federal states in Germany developed only slowly and independently as competition was strong. Early investments for the railway network during the 1830s came almost exclusively from private hands. Without a central regulatory agency the construction projects were quickly realized. Actual industrialization only took off after 1850 in the wake of the railroad construction. The textile industry grew rapidly, profiting from the elimination of tariff barriers by the Zollverein. During the second half of the 19th century the German industry grew exponentially and by 1900, Germany was an industrial world leader along with Britain and the United States.