Treaty of Versailles- league was suppossed to enforce treaty, many Americans hated the treaty because German immigrants hated it's terms eg. Reparations.
World Conflicts- Many Americans thought league suggested that America promised to send troops to world disputes. Americans appalled by loss of life & devastation of WW1, didn't want Americans to lose lives in others conflicts-> stay out of disputes as it leads to loss of life.
Economic Costs- Thought America was signing a blank cheque & promising to solve all international problems whatever the cost. Thought America was powerful because of isolationism. worried about economic costs, people wanted USA to stay out of Europe.
Freedom and independence- American's believed in freedom, didn't wan't to join because they…