Finding the One Word for a Person Believing in Lawlessness

The question asks for a single word that describes a person who believes in or actively tries to bring about a state where there is no government or law. This state is often referred to as lawlessness or anarchy.

Let's examine the given options to find the most appropriate one-word substitute for the expression "A person who believes in or tries to bring about a state of lawlessness".

• Deluge: This word typically refers to a severe flood or a large quantity of something arriving at the same time. It has no relation to belief in or causing lawlessness.
• Ephemeral: This describes something that lasts for a very short time. It is unrelated to political beliefs or actions causing lawlessness.
• Gazette: This is a newspaper or an official public journal. It does not describe a person or their beliefs about law and order.
• Anarchist: An anarchist is defined as a person who believes in or tries to bring about anarchy. Anarchy is a state of society without government or law, essentially a state of lawlessness. This definition perfectly matches the expression given in the question.

Based on the definitions, the term 'Anarchist' precisely describes a person who advocates for or attempts to create a state of lawlessness by abolishing government and laws.

Therefore, the most appropriate one word for a person who believes in or tries to bring about a state of lawlessness is Anarchist.