Glasnost, or openness, led to more information from the West, and less censorship led to a flood of criticism as people realized how much poorer the Second World was than the First. And one by one, often quite suddenly, former communist states collapsed. In Germany, the Berlin Wall came down in 1989, and East and West Germany were reunited in 1990. In Poland, the Gdansk dockworkers' union Solidarity turned into a mass political movement and won 99 of the 100 seats it was allowed to contest in the 1989 election. Hungary held multi-party elections in 1990. The same year, mass demonstrations led to elections in Czechoslovakia. In 1993, that country split up into Slovakia and the Czech Republic, the happiest and most mutually beneficial divorce since Cher left Sonny.