第一次世界大戰!!!first world war!!!

Economic -
* great destruction
* high war reparations
* hude debts
* protective tariffs

Political -
* new map of Europe
* establishment of the League of Nations
* decolonization

Social -
* unemployment, poverty, riots, social unrest
* emancipation of women
* rise of totalitarianism
* improvement of communication

Military -
* advanced weapons