What was the most important contribution to the western world from the ancient Greeks and why?

When was brutus born and when did he die? How high is the Serra da Estrela? Around 1100AD what began to influence the vikings? Does the home tab contain the most common commands? In how many wars did Joan of Arc help? Where is mining happening in the world? Why did the US invade Colombia? Who is the Baron of Corstorphine? At what point does Aeneas realize that his wife is gone? Was the White House pink at one time? What institution could be called the last remnant of the Roman Empire? Why is this cross section useful? What was Baghdad like during the Golden Age? What did allies have to supply the roman republic with? Which state gave Women the vote in 1894? Did the red tails fight in the war? What US Civil War general was responsible for starting the Second Battle of Bull Run? Who was the grandfather of Jose Rizal? What were the stages of blitzkrieg? Why does hatshepsut plan to replace the keeper of interior apartment?