L. Gould, "while Taft shared the fears about social unrest that dominated the middle classes during the 1890s, he was not as conservative as his critics believed. He supported the right of labor to organize and strike, and he ruled against employers in several negligence cases." Among these was Voight v. Baltimore & Ohio Southwestern Railway Co. Taft's decision for a worker injured in a railway accident violated the contemporary doctrine of liberty of contract, and he was reversed by the Supreme Court. On the other hand, Taft's opinion in United States v. Addyston Pipe and Steel Co. was upheld unanimously by the high court. Taft's opinion, in which he held that a pipe manufacturers' association had violated the Sherman Antitrust Act, was described by Henry Pringle, his biographer, as having "definitely and specifically revived" that legislation. In 1896, Taft became dean and Professor of Property at his alma mater, the Cincinnati Law School, a post that required him to prepare and give two hour-long lectures each week. He was devoted to his law school, and was deeply committed to legal education, introducing the case method to the curriculum. As a federal judge, Taft could not involve himself with politics, but followed it closely, remaining a Republican supporter. He watched with some disbelief as the campaign of Ohio Governor William McKinley developed in 1894 and 1895, writing "I cannot find anybody in Washington who wants him". By March 1896, Taft realized that McKinley would likely be nominated, and was lukewarm in his support. He landed solidly in McKinley's camp after former Nebraska representative William Jennings Bryan in July stampeded the 1896 Democratic National Convention with his Cross of Gold speech. Bryan, both in that address and in his campaign, strongly advocated free silver, a policy that Taft saw as economic radicalism. Taft feared that people would hoard gold in anticipation of a Bryan victory, but he could do nothing but worry. McKinley was elected; when a place on the Supreme Court opened in 1898, the only one under McKinley, the president named Joseph McKenna. From the 1890s until his death, Taft played a major role in the international legal community. He was active in many organizations, was a leader in the worldwide arbitration movement, and taught international law at the Yale Law School. One of the reasons for his bitter break with Roosevelt in 1910–12 was Roosevelt's insistence that arbitration