The Gideon v. Wainwright court case changed the legal system we know because it re-established the idea that those who cannot afford attorneys need to be provided one. The 6th amendment of the constitution says that individuals have a right to a jury trial as well as the right to an attorney. This case reassures that an attorney should be appointed regardless of what type of crime is committed.
The Supreme Court justices, who voted unanimously for Gideon, discussed how appointing an attorney to those who cannot afford one is part of creating a fair and equal justice system.
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Between 1920 and until the early 1940s, the only communist country was the Soviet Union, where the first communist revolution, led by Vladimir Lenin, was successful in 1917.
From the early 1940s onward, communism began to expand rapidly to many areas in the world. For example, after the end of World War II, the Soviet Union expanded communism in Eastern European Countries like Poland, Hungary, and Romania, where it installed puppet governments.
In 1949, another important country became comunist: China. Led by Mao Zedong, the Chinese communists won the civil war against the Chinese nationalists (the Kuomintang, who later fled to Taiwan). In the same year, the Chinese People's Republic was proclaimed.