Answer:
economic instability, political instability, impact of treaty of versailles
Step-by-step explanation:
economy: the world was still recovering from the legacy of the debt from world war i and america especially after the great depression.
politics: austria-hungary and some other nations became something new and were yet to get completely on their feet.
treaty: many citizens of germany, and other nations, thought they were being treated unfairly, leading to just one more factor that caused wwii