Select the most appropriate word for the given group of words.

One who is violently against established traditions and beliefs

iconoclast

The most appropriate word for someone who is violently against established traditions and beliefs is iconoclast.

• Egoist refers to someone who is primarily concerned with their own interests and well-being. They are not typically interested in attacking or criticizing established traditions or beliefs.
• Iconoclast refers to someone who attacks or criticizes cherished beliefs or institutions. They are often seen as being disruptive or even dangerous, but they can also be seen as being necessary for progress.
• Agnostic refers to someone who does not believe that it is possible to know for certain whether or not God exists. They are not typically interested in attacking or criticizing established traditions or beliefs, but they may be critical of the methods used to justify those beliefs.
• Stoic refers to someone who can endure pain or hardship without showing their feelings or complaining. They are not typically interested in attacking or criticizing established traditions or beliefs, but they may be critical of the emotional responses of others.

Iconoclast is the most appropriate word for this group of words because it specifically refers to someone who is violently against established traditions and beliefs. The other words do not have the same connotation of violence or aggression.