Burke took a leading role in the debate regarding the constitutional limits to the executive authority of the king. He argued strongly against unrestrained royal power and for the role of political parties in maintaining a principled opposition capable of preventing abuses, either by the monarch, or by specific factions within the government. His most important publication in this regard was his Thoughts on the Cause of the Present Discontents of 23 April 1770. Burke identified the "discontents" as stemming from the "secret influence" of a neo-Tory group he labelled as, the "king's friends", whose system "comprehending the exterior and interior administrations, is commonly called, in the technical language of the Court, Double Cabinet". Britain needed a party with "an unshaken adherence to principle, and attachment to connexion, against every allurement of interest". Party divisions "whether operating for good or evil, are things inseparable from free government".