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I believe the printing press. Before the printing press books were very rare and expensive. Most religious scrolls were put on cloth or papyrus(a type of plant). After the invention of the printing press it made books less rare and expensive. And launched the world into a more modern era.
“The United States should help free nations resist the spread of communism” best describes a belief held by President Truman that led to the establishment of the Truman Doctrine.
The Truman doctrine’s main purpose is for the United States to help in opposing the spread communist ideals around the world.
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During the high medieval period, the Islamic world was at its cultural peak, supplying information and ideas to Europe, via Al-Andalus, Sicily and the Crusader kingdoms in the Levant. These included Latin translations of the Greek Classics and of Arabic texts in astronomy, mathematics, science, and medicine. Translation of Arabic philosophical texts into Latin "led to the transformation of almost all philosophical disciplines in the medieval Latin world", with a particularly strong influence of Muslim philosophers being felt in natural philosophy, psychology and metaphysics.[2] Other contributions included technological and scientific innovations via the Silk Road, including Chinese inventions such as paper and gunpowder.
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