Thomas Carlyle's religious, historical and political thought has long been the subject of debate. In the 19th century, he was "an enigma" according to Ian Campbell in the Dictionary of Literary Biography, being "variously regarded as sage and impious, a moral leader, a moral desperado, a radical, a conservative, a Christian." Carlyle continues to perplex scholars in the 21st century, as Kenneth J. Fielding quipped in 2005: "A problem in writing about Carlyle and his beliefs is that people think that they know what they are."
