Approved for public release; distribution is unlimited / The problem of violent extremism is approaching a critical point in America. American government and community leaders must find an effective approach to deterring violent extremism immediately. A national and comprehensive approach to deter violent extremism in America is currently lacking. This comparative policy perspective seeks to determine whether the United Kingdom and Australia have good practices to deter violent extremism that can be useful in America. Secondly, this thesis also seeks to determine whether the United States can implement potential good practices to deter violent extremism. After a thorough review of the issue of violent extremism in America, this thesis studies similar background, research, and violent extremism issues in the United Kingdom and Australia. This thesis concludes that a variety of good practices in the United Kingdom and Australia can counter radicalize and deter violent extremists in America. The findings and recommendations from this research include challenges and a way forward to implement certain potential best practices for the United States. The arguments offer viable options and alternatives that the United States should consider when creating a national deterring-violent-extremism strategy. The details and information regarding understanding and implementing good practices to deter violent extremism in America are contained in this thesis. / Major, New York Army National Guard, Latham, New York