rous show trials and hundreds of thousands of political prisoners, but became more open and tolerant in the late 1960s, culminating in Alexander Dubček's leadership in the 1968 Prague Spring, which tried to create "socialism with a human face" and perhaps even introduce political pluralism. This was forcibly ended by invasion of all Warsaw Pact member countries with the exception of Romania and Albania on 21 August 1968.
The invasion was followed by a harsh program of "Normalization" in the late 1960s and the 1970s. Until 1989, the political establishment relied on censorship of the opposition. Dissidents published Charter 77 in 1977, and the first of a new wave of protests were seen in 1988. Between 1948 and 1989 more than 250,000 Czechs and Slovaks were sent to prison for "anti-state activities" and over 400,000 emigrated.
Velvet revolution and independence
In November 1989, Czechoslovakia returned to a liberal democracy through the peaceful "Velvet Revolution". However, Slovak national aspirations strengthened and on 1 January 1993, the country peacefully split into the independent Czech Republic and Slovakia. Both countries went through economic reforms and privatisations, with the intention of creating a capitalist economy. This process was largely successful; in 2006 the Czech Republic was recognised by the World Bank as a "developed country", and in 2009 the Human Development Index ranked it as a nation of "Very High Human Development".
From 1991, the Czech Republic, originally as part of Czechoslovakia and now in its own right, has been a member of the Visegrád Group and from 1995, the OECD. The Czech Republic joined NATO on 12 March 1999 and the European Union on 1 May 2004. It held the Presidency of the European Union for the first half of 2009
