The USA rejected the League of Nations because it was heavily linked to the treaty of Versailles which many Americans disagreed with, therefore this led the USA to reject joining the League of Nations because it was created to support the treaty of Versailles and to enforce its terms. The USA rejected it mainly because some were worried about the financial cost of joining. For example, many people feared that American money would be spent on keeping world peace which was Wilson’s dream (to control foreign affairs in order to abolish war to bring peace). This would mean that American money would be spent on the aims of the League of Nations which were to improve people’s working conditions and to tackle diseases; therefore American money will be spent on medication and the working environment. This suggests that the USA thought that if they signed it would be a promise made to spend money (no matter how much it may cost) in order to resolve international problems.
Secondly, some Americans opposed the League because they were ‘Anti-British’ or ‘Anti-French’ or were German immigrants who were against the idea of Peace Treaties and the Treaty of Versailles. This means that if they decided to join the League of Nations- they would fear that the League will be under British and French control which would mean that they will have to fight for the British or French Empire. They disagreed with the idea of fighting for the British or French Empire and wanted to be separated (isolated from other countries).
Thirdly, many believed that the USA had become as powerful as it had due to isolationism, therefore this contributed to the USA’s decision to reject the League of Nations as they thought that the League would be taken and controlled by the British and French which would make the USA seem less powerful. In addition to this, the USA strongly believed in isolationism meaning that they should be separate from the world. For