This is by no means a complete list for WWI (there is also one posted from last year that is relevant), but it’s a foundation…

• German ‘Sonderweg’ / ‘Mitteleuropa’
• A.J.P. Taylor ‘Timetable’ Theory
• Kaiser Wilhelm II
• Tsar Nicholas II
• Admiral Tirpitz / U-boat / Unrestricted submarine warfare / Lusitania
• Gen. von Moltke / Gen. von Schlieffen / Eric Ludendorff / Paul von Hindenburg / Eric von Falkenhayn
• Bethman-Hollweg
• Herbert Asquith / David Lloyd George / Winston Churchill / Lord Kitchner / Gen. Haig
• July Crisis 1914 / Blank Cheque
• Leuven / Rheims
• Battles of Marne, Ypres, Tannenberg, Gallipoli, Verdun, Somme, Passchendale
• Col. Kustafa Kemal
• T.E. Lawrence
• Georges Clemenceau, “I wage war!”
• Treaties of Brest-Litovsk/ Versailles, St. Germaine / Article 231 / Rhineland / Polish Corridor
• Lenin / Trotsky / Bolshivism
• Igor Stravinsky ‘Rites of Spring’ (1913) / Ballet Russes
• Modernism /Dada / Bauhaus
• Otto Dix / Käthe Kollwitz / Paul Nash
• Ernst Jünger / Wilfred Owen / Siefried Sasson / Vera Brittain
• Rosa Luxemburg / Karl Liebknecht / Spartacus League
• Miracle on the Vistula (1920)
• freikorps / Beerhall Putsch (1923)
• Einstein, Plank, Heisenberg / New Physics
• Benito Mussolini / Fascism