Economic questions became also prominent, the revenues of the empire requiring some change in the system of free trade and the adoption of protective duties, while the railroads were acquired by the various states of the empire. Meanwhile the rapid growth of socialism excited apprehension, which was added to when two attempts were made on the life of the emperor. These were attributed to the Socialists, and severe laws for the suppression of socialism were enacted. Bismarck also sought to cut the ground from under the feet of the Socialists by an endeavor to improve the condition of the working classes. In 1881 laws were passed compelling employers to insure their workmen in case of sickness or accident, and in 1888 a system of compulsory insurance against death and old age was introduced. None of these measures, however, checked the growth of socialism, which very actively continued. In 1882 a meeting was arranged by the chancellor between the emperors of Germany, Russia, and Austria, which was looked upon in Europe as a political alliance. In 1878 Russia drifted somewhat apart from Germany, but in the following year an alliance of defence and offence was concluded with Austria, and a similar alliance at a later date with Italy. This, which still continues, is known as the Triple Alliance. In 1877 Bismarck announced his intention to retire, being worn out with the great labors of his position. To this the emperor, who felt that his state rested on the shoulders of the "Iron Chancellor," would not listen, though he gave him indefinite leave of absence. On March 9, 1888, Emperor William died. He was ninety years of age, having been born in 1797. He was succeeded by his son Frederick, then incurably ill from a cancerous affection of the throat, which carried him to the grave after a reign of ninety-nine days. His oldest son, William, succeeded on June 15, 1888, as William II. [=William II. and the Dismissal of Bismarck=] The liberal era which was looked for under Frederick was checked by his untimely death, his son at once returning to the policy of William I. and Bismarck. He proved to be far more positive and dictatorial in disposition than his grandfather, with decided and vigorous views of his own, which soon brought him into conflict with the equally positive chancellor. The result was a rupture with Bismarck, and his dismissal from the premiership in 1890. The young emperor subsequently devoted himself in a large measure to the increase of the army and navy, a policy which brought him into frequent conflicts with the Reichstag, whose rapidly growing socialistic membership was in strong opposition to this development of militarism.