After the end of World War 1 in 1918, the US declared a policy of isolationism. Isolationism is a policy of non-involvement in other countries conflicts and politics and specifically for the US, non-involvement in European affairs. The US implemented this policy by denying the Treaty of Versailles in a vote of 39 to 55 in the Senate and consequently, did not join the League of Nations. This policy brought with it both positive and negative effects on the US. One positive effect is with isolation, the US can avoid the costs of dealing with conflicts in Europe and can avoid the negative effects on citizens. Another benefit of Isolationism is it allows the US to focus on domestic policy and repairing turmoil from WW1. However, one consequence of the US not getting involved is they could’ve prevented the conflicts building up in Europe that led to World War 2. With isolationism, the US can avoid the costs of war. For example, costs in World War 1 for guns, ammunition, planes, and ships in just the US was 19 billion dollars(Vanderlip). In Vanderlip’s speech One Hundred Million Soldiers he talks about how much each citizen will have to sacrifice to contribute to the war effort. This shows how if the US did not get involved in any European affairs citizens would not have to manufacture weapons and vehicles for fighting. When the US goes to war, it affects the whole country. Furthermore, another cost for the US was the loss of soldiers to illness and fighting. The US had deployed