What were some of the problems post world war i nations faced in state-building

The war brought down certain countries.

Explanation:

The consequences of the World Wars were terrible. The infrastructure of some countries was destroyed. The wars led to the depopulation of a large population. During the Holocaust in the Second World War, the Jews have almost wiped off the earth's face. About 80 million people lost their lives in the two world wars. The number of wounded was far greater. After the First World War, the Spanish flu broke out, killing 50 and 100 million people worldwide. The Spanish flu is the cause of poor quality vaccines given to soldiers and general unhygienic conditions. After the wars in many countries, general poverty broke out in many countries. The economies of many countries were destroyed, and it took years to recover.

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