Nationalism, Imperialism, Militarism, Alliances and The Assasination of Arch Duke Ferdinand. Mainly the Assasination
The correct answer to this open question is the following.
The political circumstances in Europe that led to World War 1were the following. First, ethnicities issues in different parts of Europe. Secondly, expansionist ideas to have new territorial, possesions. Then, Imperialistic ideals of domination. Next, Military alliances, and finally, the assassination of Austrian Archduke Franza Ferdinand and his wife in Sarajevo.