Who started the cold war? truman or stalin? 3 reasons why?

my work: Many historians believe that Harry Truman was the one who started the cold war. There is no specific event that led to the cold war but the war mainly broke out because the US and the Soviet Union did not trust each other. The conflicts between the two countries started during the World War II and soon escalated into many events the contributed in the war. The main reasons that led into starting of the cold war were the Truman Doctrine, The Marshall Plan, and the Atomic weapons.
Since the United States feared Communism, Harry Truman gave a speech known as the “Truman Doctrine” to stop the soviet expansion and stop Turkey and Greece from falling under communism. This is the major step that caused the cold war because the, “Truman Doctrine was not just a policy of ‘containment’ but was ‘an American challenge to Soviet ambitions’” (Clare “What was the Truman Doctrine?”).

but i need 2 more reasons

You also need to look at why the Soviet Union wanted to expand its influence around it's borders. How many times had European powers invaded Russia? What happened, what agreements were reached, at Yalta in 1945? And why?

The Cold War was a manifestation of things that had been going on long before Truman became president. What was going on that prompted Pres. Truman to articulate the Truman Doctrine?

Whatever conclusions you come up with, damon, be sure you can back them up with specific references to historians and published work, as writeacher advises.

... and it was Turkey, Greece and Iran in the Middle East by the way.

... and what about Eastern Europe - Poland, Hungary, etc

Two additional reasons why many historians believe Harry Truman started the Cold War are the Marshall Plan and the use of atomic weapons.

1. The Marshall Plan: After World War II, Europe was devastated and in need of reconstruction. In 1947, Truman proposed the Marshall Plan, which aimed to provide economic aid to European countries to help rebuild their economies and prevent the spread of communism. While the Marshall Plan was presented as an effort to promote economic recovery, it was seen by the Soviet Union as an attempt to spread American influence and ideology. This further heightened tensions between the United States and the Soviet Union, contributing to the start of the Cold War.

2. The use of atomic weapons: In August 1945, Truman authorized the deployment of atomic bombs on the Japanese cities of Hiroshima and Nagasaki, leading to Japan's unconditional surrender and the end of World War II. While this action cannot be solely attributed to starting the Cold War, the use of atomic weapons demonstrated the immense power and capabilities of the United States. This display of military might sparked fear and apprehension in the Soviet Union, as it established the United States as a dominant global superpower. It also set the stage for the arms race between the two nations, as they both sought to develop and enhance their nuclear arsenal, further escalating tensions and contributing to the Cold War.

I can't support that Truman started the Cold War. And judging from your lack of reasons, you can't support it either.

I agree with Ms. Sue.

You say that historians believe Truman started the cold war, but you don't name the historians or their publications.

You say that Truman started it with the Truman Doctrine, but that speech didn't come out of the blue. It was in reaction to "soviet expansion ... " So trace it back.

I think you'll find yourself researching the end of WWII or maybe earlier. How did Europe get divided up between the Allies and the Soviets? Why did that happen? What were the divisions? How long did that last? ... and on and on ...

What you wrote has bits and pieces, but not the whole story ... and not in any sequential order.