While Byron's verse plays have been overshadowed by his nondramatic poetry, in recent decades critics have begun to examine thematic and stylistic aspects of his dramatic oeuvre. Critics have noted that, like his poems, Byron's plays frequently contain autobiographical elements, and have drawn parallels between Byron's own controversial and exceptional nature and the qualities of the classic Byronic hero, a defiant yet guilt-ridden protagonist who rebels against the strictures of conventional society to follow his own value system. Furthermore, as many of his dramas feature heroes who have been exiled or persecuted for their actions, many scholars have perceived his plays to be explorations of his own scandalous and colorful experiences. Political and social themes—such as ideology, class allegiance, and the effects of violence—have been identified as central to Byron's plays. Commentators have also examined the evolution of Byron's drama, tracing his experimentation with plot, theme, and character in his works, and assessing the impact of the radical developments in German drama on his historical plays. Other critics have investigated the influence of Shakespeare and Milton on Byron's plays as well as his place within the tradition of British Romantic drama.