Likbez was a Russian campaign aimed at eradicating illiteracy. It took place during the 1920s and 1930s.
The campaign started on December 26, 1919, when Vladimir Lenin signed a decree which ordered that all people aged 8 to 50 were required to become literate.
The campaign was a great success. In 1917, about 60% of the population was illiterate, but this fell to 39.1% by 1926, then down to 10.3% by 1939. By the 1950s, the Soviet Union had achieved almost 100% literacy.
Today, likbez is a Russian slang term to describe an answer to a common question.