How did historians judge Truman's this decision?

Historians have offered varied interpretations of President Truman's decision to use atomic bombs on Hiroshima and Nagasaki in 1945. Some argue it was a necessary action to swiftly end World War II and save lives by avoiding a costly invasion of Japan. Others criticize it as an unnecessary display of power that caused immense civilian suffering and set a troubling precedent for nuclear warfare. Overall, the decision remains a contentious topic, reflecting broader debates about military ethics and the nature of wartime leadership.