Answer:
Miller wrote the Crucible because he was concerned about McCarthyism, which was a judicial doctrine that tried to oppose the spreading of Communist ideas in American people.
Step-by-step explanation:
Miller shows this political climate in the United States through the Crucible and also through his play witch trials of Salem Massachusetts. During this play, McCarthyism is showed as a whole and it also presents Miller's search to eradicate Communism without using constitutional rights.
After World War II, Communism was considered an American way of life and many politicians created some tactics against the government or anyone who had liberal ideas.