Question: who was the most important person in ww1?
Answer: Sergey Sazonov. ... 
Raymond Poincare. ... 
Tsar Nicholas II. ... 
Franz Joseph I. ... 
Theobald von Bethmann-Hollweg. ... 
Kaiser Wilhelm. ... 
Arch Duke Franz Ferdinand. ... 
Gavrilo Princip. Black Hand Operative: Assassinated Arch Duke Franz Ferdinand, triggering the July Crisis.