World War One (Global History), history homework help

Title:Why is World War One often referred to as a "cultural watershed in Global History"? Project instructions:PLease read the additional files and follow the instructions and requirement on it.The introduction part should be 3/4 to 1 page length.(double spaced)1500-1750 words total not include bibliography and endnotes.Additional requirements:Number of pages: 6  Number of sources: 16  Citationstyle: chicago  Academic level: collegeyear3  Course name: world history  Course level: university third year