The problem with which this investigation is concerned is that of the warrior-hero ideal as it evolves in Shakespeare's English and Roman plays, and its ultimate failure as a standard for exemplary conduct. What this study demonstrates is that the ideal of kingship that is developed in the English histories, especially in the Second Tetralogy, and which reaches its zenith in Henry V, is quite literally overturned in three Roman plays--Julius Caesar, Antony and Cleopatra, and Coriolanus. The method of determining this difference is a detailed analysis of these groups of plays. This analysis utilizes the body of Shakespearean criticism in order to note the almost total silence on what this study shows to be Shakespeare's growing disillusionment with the hero-king ideal and his final portrait of this ideal as a failure. It is the main conclusion of this study that in certain plays, and most particularly in the Roman plays, Shakespeare demonstrates a consciousness of something more valuable than political expediency and political legality. Indeed, the tragedy of these political heroes lies precisely in their allegiance to the standard of conduct of the soldier-king. Brutus, Antony, and Coriolanus, among others, suffer defeat in their striving to capture a higher reality. This investigation demonstrates that the concept of honor has lost its value in the social matrix of political machinations.