How far was WWI caused by imperialism?

A way in which imperialism was an important cause for the First World War was the German wish for expansionism. The policy of Weltpolitik, which was adapted to help Germany gain "her place in the sun", involved the increasing reliance on militarism, the expansion of the navy and the aims of aggressively acquiring of territories. The imperialistic attitudes of the time made Germany feel left out, as in order to be a great power she needed to expand. This expansionism and the hostility the Weltpolitik caused in the international atmosphere of Europe led to the deterioration of diplomacy and therefore set the foundations of a military conflict, that is WWI. On the other hand, a way in which imperialism cannot be seen as a significant cause is the alliance between Great Britain and France. The two biggest imperial rivals ended up in an alliance, called the Entente Cordiale, to oppose Germany and her increasing influence. As the two nations who had previously got into the biggest imperial struggles, during the Scramble for Africa, sided together for WWI, it must be concluded that imperialism, in this way, could not have caused the war.