What was a lesson that the enlightenment taught people?

The enlightenment taught people to think for themselves and to challenge the existing structures that were tyrannical. This is because it heralded an age of reason whereby people begun to question whether the prevailing systems were working for them which led to changes in various spheres

`stare decisis is a legal doctrine that obligates courts to follow historical cases when making a ruling on a similar current or future case. stare decisis ensures that cases with identical facts be approached in the same way, unless overruled by the same court or a higher court such as the us supreme court. simply put, it binds courts to follow legal precedents set by previous decisions.

stare decisis is a latin term meaning "to stand by that which is decided".