Earliest known appearance in print, attributed to Jefferson: see above
Status: This quotation has not been found in the writings of Thomas Jefferson. Although its first known appearance in print was in 2014, it appeared online at least as early as 2011 (although not, at that point, attributed to Jefferson).3 It was first attributed to Jefferson in January 2012 on Twitter.4 This second occurrence with attribution to Jefferson propagated quickly on Twitter and is still being repeated.
1. These sources were searched for the phrase "freedom is lost gradually," and individually for the words "uninterested" and "uninvolved," both of which appear only a handful of times in Jefferson's writings.