I did my thesis on this subject. The bottom line was that English and American banking interests (both Jewish and non-Jewish as lead by J.P. Morgan, who was not a lover of Jewish people) lent millions of dollars to the British government so that they could fight the war. The war was over empire, pure and simple. The British had the empire and the Germans wanted in (no good guys). Various American interests tried to stop the banks from lending the money because they knew that if the British started to lose the war, America would be drawn in to save “Morgan’s millions.” J.P. Morgan was and largely still is, the heart of the American banking system so there was systemic risk. The war stalled to a bloody draw by 1916 and in comes the American army. To fully appreciate this very complicated issue you must make a study of German history going back to Roman times and it helps a lot if you are fluent in German and you don’t take British history as it is commonly taught in the schools too seriously. Good luck.
What was the conclusion of your thesis...in a paragraph or two?