What is the meaning of [If it ain’t broke, don’t fix it]

If something is working adequately well, leave it alone.

Humans seem to have the urge to improve things. Prehistoric hand-axes were made by repeatedly chipping small flakes off pebbles of flint with other hard objects. Million-year-old examples of these have been found that give the impression of being ruined by being chipped just one time too many. That pang of regret we have probably all felt after spoiling something by adding that unnecessary final touch was first faced by Ugg in his cave.

If it ain’t broke, don’t fix itThe thought may be Stone Age but the phrase ‘if it ain’t broke don’t fix it’, which sounds as though it might come from the Roosevelt or Truman era, is more recent than that. This one is widely attributed to T. Bert (Thomas Bertram) Lance, the Director of the Office of Management and Budget in Jimmy Carter’s 1977 administration. He was quoted in the newsletter of the US Chamber of Commerce, Nation’s Business, May 1977:

Bert Lance believes he can save Uncle Sam billions if he can get the government to adopt a simple motto: “If it ain’t broke, don’t fix it.” He explains: “That’s the trouble with government: Fixing things that aren’t broken and not fixing things that are broken.”