Ancient Greek period can be divided into classical period and Hellenistic period. Hellenistic mathematicians were famous in spreading their discoveries throughout the world. Hellenistic period was great as many philosophers and mathematicians emerged during that age.
There were many famous Greek mathematicians like Pythagoras, Aristotle, Ptolemy and Euclid.
Pythagoras Theorem proposed by Pythagoras is in use even today.
‘Elements’ is the famous book of science written by Euclid. This was book was based on Geometry. The science of mathematics reached it pinnacle during Hellenistic period.
The answer is World War I.
World War I started in 1914. This war caused citizens to revolt and overthrow corrupt governments in areas like Russia, where the Bolshevik Revolution took place during 1917.
World War I ended with the Treaty of Versailles in 1919. This punished Germany for the beginning of World War I. Along with Germany, several other countries were destroyed. Not only was their infrastructure destroyed, their economy was suffering as well. This all helps lead to the rise of fascism.
“What you keep in your mind” :)
