In passing the Coinage Act, Congress eliminated bimetallism. Cleveland believed that bimetallism encouraged the hoarding of gold and discouraged investment from European financiers. To finance the Civil War, the U.S. switched from bimetallism to a flat greenback currency. Bimetallism became a center of political conflict toward the end of the nineteenth century. Having a currency be defined in terms of two different metals is called bimetallism. Dubois' most prominent position, however, was in support of bimetallism. Beside petrochemical component, SP is also affected by electrokinetic potential and bimetallism. Other scholars claimed that in practice bimetallism had a stabilizing effect on economies.