To what extent was Mussolini responsible for the failure of the league?

Benito Mussolini was an extremely influential figure in Europe in the 1930s. Many argue that Mussolini was responsible for the downfall and eventual failure of the League of Nations. Mussolini wanted to regain the Roman Empire to it's former glory, and initiated his nationalistic plan with the invasion of Abyssinia in 1935.

a king decides to declare war on a neighboring country without the input of any advisers

answer; a farmer who refuses to fight in his country's army;