Here are the earlier (and current) versions of the Scrum Guide, going back to 2010: some interesting
2020 November– CURRENT VERSION OF THE SCRUM GUIDE
2017 November SCRUM GUIDE
2016 July SCRUM GUIDE
2013 July SCRUM GUIDE
2011 October SCRUM GUIDE
2011 July SCRUM GUIDE
2009 May SCRUM GUIDE
Notes on the revisions from Ken Schwaber & Jeff Sutherland