Why was the United States unable to avoid entering a Cold War with the Soviet Union?

Why was the United States unable to avoid entering a Cold War with the Soviet Union?

Use one publicly accessible source. Include URL in citations.

Your initial response to the question should be between 250 – 300 words long. Include references and citations where necessary to ensure proper credit and documentation of your sources. You are welcome to include references in addition to the course textbook, just ensure that you use proper documentation.