Locke's most important intervention in political debate, The Two Treatises, was published anonymously in 1690, and Locke always denied authorship throughout his life, acknowledging it only in a codicil to his will. There has even been much debate about exactly when it was written. It used to be thought that the Treatises (which for all practical purposes, represent a single work) was written not long before its publication, so that it represented a justification of the Glorious Revolution after the fact. It is now more generally accepted that it was written a decade earlier, probably in 1679-81 that is, around the time of the Exclusion Crisis. This makes it not a retrospective justification of a revolution already safely completed but a subversive call to revolutionary action. If this is so, it certainly explains Locke's reluctance to admit authorship, especially since the Revolution never looked to its participants as absolutely secure. Whatever Locke's motivations writing this work, it was to have great influence in later centuries, across a wide political spectrum, not least in the American Revolution and in other revolutions thereafter.