In the 1920s, the dye industry leaders, led by Carl Duisberg of Bayer and Carl Bosch of BASF, successfully pushed for the merger of the dye makers into a single company. In 1925, the companies merged into the Interessengemeinschaft Farbenindustrie AG or IG Farben. The huge corporation, which soon included related industries such as explosives and fibers, was the biggest enterprise in all of Europe and the fourth largest in the world, behind General Motors, United States Steel and Standard Oil of New Jersey.