Need help with world history speech on world War 1?

i have to give a four minute history speech, arguing the point that world war 1 was an inevitable conflict owing to the ambitino and fears of the great powers couples with the demise of the ottoman empire. One of the points i have is because Germany was over agressive, also because of distrust and alliances being made. I need some more topics to talk about. Anything would help. Thanks in advance