Regency critics praised the novel's wholesome morality. The Victorian consensus treated Austen's novels as social comedy. In 1911, A. C. Bradley restored the moral perspective, praising "Mansfield Park" for being artistic while having "deeply at heart the importance of certain truths about conduct". The influential Lionel Trilling (1954), and later Thomas Tanner (1968), maintained emphasis on the novel's deep moral strength. Thomas Edwards (1965) argued that there were more shades of grey in "Mansfield Park" than in her other novels, and that those who craved a simple dualist worldview might find this off-putting. In the 1970s, Alistair Duckworth (1971) and Marilyn Butler (1975) laid the foundation for a more comprehensive understanding of the novel's historical allusions and context.