His decision to use the atomic bomb against Japan is the one that gets the most discussion, I think.
hatshepsut because
This is probable iron.
The greatest effect is that the US victory made it a "world power" for the first time.
Ramses 2
United States presidents have taken actions that have had a significant effect on United States foreign or domestic policies. In fact, President Lincoln and President Truman are listed as the Presidents who took one of the most difficult presidential decisions in our nation's history. It is this authority of thought that apparently helps explain some of the most difficult presidential decisions in our nation's history - Lincoln's Emancipation Proclamation, Truman's go-ahead with the atomic bombings of Hiroshima and Nagasaki. A deeper reading into the lives of American presidents show that great leaders often have to amend their previous interpretations of what is a "correct" moral stand. Those decisions dictated a course of history. They were also a turning point. Most historians agree that those decisions were big in the days, and could not agree which one was bigger.
When Truman was president.
He effect the history by being one of the greatest writers of all time. He inspired many people to write.
The CFC's have greatest effect. They react with ozone to deplete it.
It had the greatest effect on the railroad industry.
The only thing he cared was to end that bloody war and put an end to the means of the Japanese to make war never again.
CFc's have the greatest effect. the decompose ozone.
Water, or the lack of water, has the greatest effect on cacti.