The question of whether World War II and the eventual participation of the United States in it were inevitable is a complex and highly debated topic. To address this question, we must consider the geopolitical climate leading up to the war, as well as the actions and decisions of key leaders such as Neville Chamberlain and Franklin D. Roosevelt. While many factors contributed to the outbreak of the war, this essay argues that, given the circumstances and the changing dynamics of the time, the war and U.S. involvement were not entirely inevitable, but rather a result of a combination of factors, including diplomatic failures and the expansionist ambitions of aggressive powers.