Write a thesis statement, this is what I have. Can you re-word it better? To sound more academic.

The US was not justified in using the atomic bomb against Japan in WWII because Truman’s chief of staff said the Japanese were ready to surrender.
Also I need 3 more reasons to support the thesis statement above. Thank you

The decision to use the atomic bomb against Japan in World War II was unjustified, as evidence suggests that Japan was already on the brink of surrender. Additionally, the devastating effects of the atomic bomb on civilian populations and the lack of targeting military infrastructure further call into question the morality of using such a destructive weapon. Furthermore, the lack of consideration for diplomatic negotiations and potential long-term consequences of using the atomic bomb undermines the ethical justification for its use. Moreover, the disproportionate use of force in relation to the perceived threat posed by Japan raises ethical concerns about the decision-making process surrounding the use of nuclear weapons in warfare.