The Threat from Within

The Threat from Within is Frank A. Capell’s uncompromising warning that America’s greatest danger is internal subversion rather than external attack. Drawing on decades of anti-Communist investigation, Capell argues that Communist ideology advances not through open conquest but through infiltration—using front organizations, cultural influence, religious compromise, civil rights rhetoric, and government bureaucracy to weaken national resolve from within. The book insists that confusion, moral relativism, and deliberate deception have allowed enemies of the Constitution to operate under the protection of tolerance and denial. Capell’s conclusion is stark and urgent: unless Americans recognize the nature of the threat, name it honestly, and resist it without apology, the nation will surrender its freedom without ever hearing a shot fired.