History of socialism under challenge from Solidarność, or Solidarity, a labor union under the leadership of Lech Wałęsa. The union was sufficiently threatening to the government that on 13 December 1981, the head of state, Wojciech Jaruzelski declared martial law, suspended the union, and imprisoned most of its leaders. Mikhail Gorbachev (born 1931), who took control in 1985, was the first Soviet leader to have been born after the October revolution. He is remembered for three initiatives: "glasnost", "perestroika", and the "Frank Sinatra doctrine". "Glasnost", or "openness", was Gorbachev's term for allowing public debate in the Soviet Union to an unprecedented degree. "Perestroika"
The Age of Openness international perspective." While Dikötter does not deny the devastation caused by the Chinese Civil War or the Japanese invasion, he nonetheless argues that the Republican period was a "golden age of openness" in which the country was making substantial progress toward modernity, boldly experimenting with ideas and market reforms, and building vast infrastructure projects. Historian Jonathan Spence wrote that "The Age of Openness" ""presents a cornucopia of graphic examples to show that China in the first half of the twentieth century, far from being in a state of decay that called for revolutionary action, was in fact a vibrant and